Mirror Definition and 630 Threads

Homework Statement (a) On a sunny afternoon in April, three physics students took a mirror and a screen to the roof of a building. They selected a distant building, and while one student held the mirror a second one adjusted the distance between the screen and the mirror in an attempt to form...

hey guys i really need help with these problems.I am not good with physics at all, i just need this to graduate . I really don't understand it and my teacher isn't much help. If anyone can help me out with this i would really appericiate it. Thank you. 1.Why are parallel light rays used to...

hey guys i really need help with these problems.I am not good with physics at all, i just need this to graduate . I really don't understand it and my teacher isn't much help. If anyone can help me out with this i would really appericiate it. Thank you. 1.Why are parallel light rays used to...

lenses and mirrors?? hi all, i was wondering what would happen if a convex lens and a concave mirror were set up one after another, the convex len being first to receive the light. how would this work in spot lights? i don't see howa spot light can have a tightly focused spot on a stage, i...

Q#1. Homework Statement [/b] an object and an observer are located 2meter in front of a plane mirror, If the observer is 3meter from the object, find the distance between the observer and the location of the object's image. Q#2. the image produced by a convex mirror is always closer to the...

How does reflecting of a light works? In physics people keep talking about mirrors in lasers and optics, etc. but how does mirror works at sub-atomic level? Does the light wave simply excite the electron which then sends identical wave in opposite direction? Or does it simply bumps off a...

Mirror and laser beam angle...please help! Homework Statement The mirror deflects a horizontal laser beam by θ=59°. What is the angle φ? Homework Equations The Attempt at a Solution I don't understand this. How am I supposed to figure out φ?

I'm really bad at physics and am quite lost on a homework assignment of mine. Any help that I can get would be fantastic, thanks. Homework Statement A concave mirror has a radius of curvature of 60 cm. Calculate the image position and magnification of an object placed in front of the...

I have been working on making a pair of matched 200mm f6 primary mirrors. I have been using Texereau as a guide. I think I have finished fine grinding. I would like to find someone near middle Tennessee to look at my work and offer advice, especially as I begin polishing. Any Ideas?

Eigenstates: What would happen if you had a laser aimed at a mirror 45 degrees... I know this post might fit under some of the other post in this forum but i would like to ask it as a new topic because I am just getting into a lot of Quantum information ever since I noticed this part of the...

Homework Statement A concave mirror (f = 44 cm) produces an image whose distance from the mirror is one-fourth the object distance. (a) Determine the object distance. cm (b) Determine the (positive) image distance. cm Homework Equations 1/do +1/di =1/f do=object...

[SOLVED] Forming Images with a Plane Mirror Homework Statement (a) How rapidly does the distance between you and your mirror image decrease if you walk directly toward a mirror with a speed of 4.7 m/s? (b) Repeat part (a) for the case in which you walk toward a mirror but at an angle of...

Hi, I am currently working on an art installation for my degree show that involves projecting a video image onto a two-way mirror so that the viewer on the other side can simultaneously see their reflection and the video image, but am having problems with the technicalities of this. Does...

Homework Statement A person 1.62 m tall wants to be able to see her full image in a plane. a) What must be the minimum height of the mirror? b) How far above the floor should it be placed, assuming that the top of the person's head is 15 cm above her eye level? Draw a ray diagram...

Homework Statement An object is magnified, by a factor; of 5, in a concave mirror. The mirror has a focal length of 20cm. Calculate ALL possible positions of the object. Homework Equations M=Hi/Ho=Di/Do M=V/U 1/F=1/V+1/U The Attempt at a Solution 1/20=1/V + 1/U -1U=20V/V U=-20...

Homework Statement Focal length of a concave mirror. This was an experiment, done in class. I was required to collect a light globe:(of course with a power source) for the object, paper:screen/image, and a concave mirror. I created the images, of the globe filament, to the screen...

Ghost MIRROR? One of the links on Youtube from the Ghost Car video link to a "ghost mirror" video. I didn't want to hijack that thread, so I just started a new one. Here's the video: I haven't taken optics, so could someone help me out here? I really need to go pee, but am afraid of...

can i use a watch glass as a primary mirror of dobsonian telescope?

can i use a concave aluminum mirror as an objective mirror of a dobsonian telescope??

Hi, Is there more foreshortening when I look in the mirror than when I look at a video or photograph of myself. For example, if I am naked, or with bare legs, and I walk towards a mirror, will my knees look lower to me than if I watch a video of myself walking towards the camera? (assuming...

A concave mirror has a radius of curvature of 0.5 m. At what position should and object be placed to produce an upright virtual image that is 3.0 times as large as the object? I have just no clue for this question,, but I have to understand it T.T can any1 help me please>..

Using the mirror equation and the magnification equation, find the four properties of the image formed in a convex mirror with a radius of curvature of 1.5 m, if the object is 80cm from the mirror and is 0.25 m high. my question: what do they mean by 4 properties?

I still find these stuff hard, I have 2 question to ask about... 1. Use the mirror equation to find the image location and the height of an object placed at the centre of curvature of a concave mirror. Also find the magnification. Hint: What is the relation between the focal length and the...

20. Using the mirror equation and the magnification equation, find the four properties of the image formed in a concave mirror with a focal length of 50 cm, if the object is 1.5 m from the mirror and is 2.5 cm high. Can anyone tell me the mirror equation and magnification equation and how...

The light from a star reflects from a concave mirror with a radius of curvature of 1.70 m. Determine how far the image of the star is from the surface of the mirror. I also don't know how to do this one either :cry:

A concave mirror has a focal length of 26 cm. What is the radius of curvature of the mirror? and also The radius of curvature of a convex mirror is 60 cm. What is the focal length of the mirro? Can anyone tell me the formula for finding each of the answer?...

As the object is moved along the principle axis toward the vertex of a concave mirror, the type of image changes. Where does the change in type of image occur? Explain why, in terms of the path of the light rays. I just don't know what it means, can you guys help me with this question?... I...

1.Dubbie is moving directly along a normal line toward a plain mirror at a speed of 3.5 m/s, what is the speed of the image relative to Dubbie? 2. What is the speed of the image, relative to Dubbie, if Dubbie walk away from the mirror surface at 3.5 m/s at an angle of 300 to the...

Question: At the bottom of a glas bath lies a mirror covered by 20cm of water.In the air,30 cm above the water there hangs a lamp.Find the distance from the mirror at which an observer looking into the water will see the image of the lamp in the mirror Relevant Formula: apparent shift...

There is a woman who is 1,75m tall standing in front of a mirror. Her eyes are to be 10cm below the top of her head. I have to find out how small the mirror can be so that she can still see her entire body in it and how high it has to be hanging on top of the floor. Now I think I can solve it...

A mirror is required with magnification 9.5 when an object is 14mm from the mirror What is the focal length My attempt: M=v/u 9.5=v/14 v=133 1/f = (1/v)+(1/u) 1/f=(1/133)+(1/14) f=12.67 Since no object is magnified when the created image is outside of 2f this answer can't be...

A spherical mirror is polished on both sides. When used as a convex mirror, the magnification is +1/4. What is the magnification when used as a concave mirror, the object remaining the same distance from the mirror? I started with: mconvex = 1/4 mconcave = ? doconvex = doconcave...

A 1.0 cm high object is situated 11.0 cm in front of a concave mirror that has a radius of curvature of 8.00 cm. Using a ray diagram drawn to scale (the mirror must be drawn to scale): (a) measure the location of the image: 6cm (infront of the mirror) (b) measure the...

Hi all, I know some men, who are amater astronomers. They made themseves reflective telescopes which can see the crescent Venus and many others in the sky. They say they make the mirrors parapolic shape although the depth of the mirror is very thin (about 1 - 2 mm). The diameters are often...

Hello, We have an installation in which we will be placing a 1/4" thick mirror which spans 7ft across and 5ft in height directly next to a "line of fire" (a gas pipe with holes which will have a flame approximately 6" in height). Our concern is that when the line of fire is turned on in...

I have a problem with which I would appreciate any help that is offered: I have a 266nm laser (frequency quadrupled 1064nm Nd:YAG), and the energy losses along the route are a little strange. The beam is reflected by two UV mirrors; however, the first mirror loses ~7% of the in-going energy...

I recently read about a proposed liquid mirror telescope to be constructed on the moon. My question is one of mechanics, hence this not being in the astronomy section. My question is regarding the shape of the surface of a rotating liquid. The design will have a dish containing a thin layer...

1. When we talk about flat mirrors, it says that the size of image appears in the mirror is the same as of the object. Is the long rectangular mirror at home that is hang on the bedroom door to see how you look like when you dress up a flat mirror? If so, then when we approach the mirror, our...

How do mirror sunglasses work? I used to think that they worked like "one way mirrors" but those are just half silvered glass - meaning that if you are standing in a bright room looking through it into a dark one you'll see your reflection but if you look from a dark room into a light room you...

Check this out: In base 2 take all (or the first several hundred thousand) the odd numbers and figure out the mirror image of the bit string for each number. Ex: mirror of 11111 is 11111 mirror of 1011101 is 1011101 mirror of 100000001111 is 111100000001 You can't really mirror an even number...

Tanya is sitting in an optometrist’s chair, facing a mirror that is 2.25 m from her eyes. It the eye chart she is looking at is hanging a wall behind her head, 1.75 m behind her eyes. How far from her eyes does the chart appear to be? Would the answer be 4 m? (2.25 m +1.75 m)... I'm...

Hello! I'm stuck on this problem... A thin flat plate of partially reflecting glass is a distance (b) from a convex mirror. A point source of light (S) is placed a distance (a) in front of the plate so that its image in the partially reflecting plate coincides with its image in the mirror...

Hi guyz, Can anyone tell me what is the difinition of the concept "Magnetic Mirror" and give me enough information about it with examples? Thanks :)

Hi, I was wondering if it would be possible to focus light down to a small point using the following method: Construct a pyramid from four identical triangular mirrors (three would also work), with the mirrored side facing inwards of course. Do not put a base on the pyramid, but instead use...

[FONT="Garamond"]If two planes of mirrors (infinite in all directions) were facing each other with nothing in between what would they reflect? How does light come into play in this?

Is there an easy way to remember the signs used for the mirror equation? For lenses? How does one keep the signs separate with talking about mirrors and lenses? I find it confusing... Please help, thanks!

Homework Statement 1. Dubbie is moving directly along a normal line toward a plain mirror at a speed of 3.5 m/s, what is the speed of the image relative to Dubbie? 2. What is the speed of the image, relative to Dubbie, if Dubbie walk away from the mirror surface at 3.5 m/s at an angle of 300...

Convex mirror. PLEASE HELP! Homework Statement An object 30 cm tall is placed 20 cm in front of a convex mirror. If the height of the image is +10 cm, find the focal length of the mirror. Homework Equations The Attempt at a Solution I know to use 1/f = -(Image distance from V)...

Hi everybody I am not so sure if this question is suitable to be in this box, but I hope it is. I know that all metals are opaque because they have lots of free electrons which absorb the energy of photons. But a polished surface of metal reflexes light other than absorbs it, especially...

Homework Statement The rear window in a car is approximately a rectangle, 1.3 m wide and 0.30 m high. The inside rear-view mirror is 0.61 m from the driver's eyes, and 1.37 m from the rear window. What are the minimum dimensions for the rear-view mirror if the driver is to be able to see the...