What is Convex mirror: Definition and 33 Discussions

A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex (bulging outward) or concave (recessed inward). Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices. The most common non-spherical type are parabolic reflectors, found in optical devices such as reflecting telescopes that need to image distant objects, since spherical mirror systems, like spherical lenses, suffer from spherical aberration. Distorting mirrors are used for entertainment. They have convex and concave regions that produce deliberately distorted images. They also provide highly magnified or highly diminished (smaller) images when the object is placed at certain distances.

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  1. N

    I Two mirrors to focus sunrays into a tiny spot -- possible?

    Hi guys, i am Nenad Komjenović from Bosnia and Herzegovina, I am just a regular guy, who likes geeky stuff and i don't know physics, so i wanted to ask you guys for an opinion. I was inspired by the "Markus Kayser - Solar Sinter Project" Youtube video, in which the guy used fresnel lens to...
  2. H

    Lawn/Garden Convex Mirror in Backyard to reflect sunlight onto the house

    Hello- I am starting a project to get direct sunlight onto the house by placing convex mirrors on the outside stone fence of the backyard since it is the only place of my property that is not shaded by other houses in the neighborhood. For that, I need to calculate the size of the mirrors...
  3. Phil123

    [LENS] Given focal length and height, find object distance

    Homework Statement An object is in front of a convex mirror. We then obtain an erect image whose height is equal to 25% of the height of the object. What is the distance between the object and the mirror if we know that the focal distance is equal to 0.2m? Homework Equations M = Yi/Yo = q/p...
  4. Sciencelover91

    How do you derive the mirror equation with a convex mirror?

    Homework Statement Derive the mirror equation for a convex mirror (Si*So=f^2). Do not use a Ray heading toward the center of curvature point (C). Si - distance between the object's image and the focal point. So- distance between the object and the focal point. Do- distance between the mirror...
  5. B

    Calculating Image Height of Flower in Convex Mirror | Homework Question

    1. Homework Statement A convex spherical mirror with a focal length of magnitude 25 cm has a 4.0-cm tall flower placed 100 cm in front of it. What is the height of the image of the flower? a.20 cm b. 1.6 cm c .0.80 cm d. 4.0 cm e. 8.0 cm Homework Equations 1/f=1/do+1/di M=-di/do=hi/ho The...
  6. heavystray

    Thick convex mirror or a thin one for the anti-theft mirror?

    the question in my exam goes like this: should we use a thick convex mirror or a thin one for the anti-theft mirror? the given answer: thin, because a thin convex mirror does not form multiple images can someone please explain to me why a thin spherical mirror does not form multiple images...
  7. heavystray

    Does Convex Mirror Thickness Affect Focal Length and Image Sharpness?

    hello guys, so i want to ask whether the thickness of a convex/concave mirror affect its focal length and the sharpness of image formed? and what really determines the sharpness of image? thanks for replying in advance! :biggrin::biggrin:
  8. X

    Convex mirror find object distance

    Homework Statement An object is placed in front of a convex mirror with a 45.6-cm radius of curvature. A virtual image half the size of the object is formed. At what distance is the object from the mirror? Homework Equations 1/f=1/d0+1/di hi/h0=-di/d0 The Attempt at a Solution hi=-1/2h0...
  9. S

    Silvering of Plano-Convex Lens

    If the plane surface of a plano-convex lens in silvered then which of the following statements is true? 1. it acts like a convex mirror 2. it acts like a concave mirror 3. it acts like a concave lens 4. no changemy attempt--- the incident ray on the convex surface of the plano-convex will...
  10. B

    Convex mirror question how long the image is?

    Shiny lawn spheres placed on pedestals are convex mirrors. One such sphere has a diameter of 40 cm. A 12 cm long robin sits in a tree 1.5 m from the sphere. (a) Where is the image of the robin? (b) How long is the image? f=R/2 to find radius 1/v=1/f-1/u to find image distance (the mirror...
  11. J

    Solving a convex mirror problem

    Homework Statement Given the following information: convex mirror, focal length (f) = 12.5 metres, height object (ho) = 5 metres, height image (hi) = 1 metre. Find distance object (do) and distance image (di). Homework Equations 1/f = 1/do + 1/di Magnification= -hi/ho = di/do...
  12. E

    Why doesn't my convex mirror reflection match the expected focal point?

    Homework Statement For self study, I've been trying to understand my convex mirror. Some online instruction I've been following states that if an incidence ray (red line in my model, below) parallel to the principal axis (black line) hits a convex mirror (full curvature outlined in black...
  13. A

    Focal length of a convex mirror

    Homework Statement An object is 12.0 cm in front of a convex mirror. When the convex mirror is replaced with a flat mirror, the image distance is 5.0 cm farther away from the mirror. What is the focal length of the convex mirror? Homework Equations f=-1/2R 1/do+1/di=1/f The...
  14. K

    Convex Mirror & Virtual images

    1. A spherical mirror is used to form an image 5 times as tall as an object, on a screen positioned 5.0m from the mirror. a) Describe the type of mirror required b) Where should the mirror be positioned relative to the object 2. M = (Di)/(Do) & 1/(Di) + 1/(Do) = 1/(F) 3. I have...
  15. P

    Forming an Image Behind a Convex Mirror

    Homework Statement An object is placed in front of a convex mirror whose radius of curvature is R. What is the greatest distance behind the mirror that an image can be formed? A. Infinity B. R C. R/2 D. No image can be formed. Homework Equations 1/do + 1/di = 1/f The...
  16. W

    Coverage Area Of Light Reflected Using A Convex Mirror

    I have a real-world situation I need help with before I run out and spend money. I have a wall that is in the shadows. I want to use a convex mirror to reflect sunlight onto the wall, covering as much of the surface area as possible. I will need a convex mirror with the right diameter and...
  17. M

    Image formation with a convex mirror

    Homework Statement An object 2.00cm high is placed 12.0cm in front of a convex mirror with radius of curvature of 8.00cm. Homework Equations Where is the image formed? Draw a ray diagram The Attempt at a Solution do i use the equation m=-q/p? if so then (object distance)p= 12cm...
  18. Y

    Difference between convex lens formula and convex mirror formula

    Homework Statement difference between convex lens formula and convex mirror formula The Attempt at a Solution for convex mirror you make focal point negative and use the 1/f = 1/do + 1/di but for convex lens do you do the same? you don't make the f negative i think am i...
  19. zimo

    A lens and a convex mirror problem

    Homework Statement A body is positioned 40 cm from the left of a lens (f=30) and the lens is positioned 100cm left of a convex mirror (|R|=60), where will be the image and what type and magnitude will it have? Homework Equations 1/u + 1/v = 1/f The Attempt at a Solution I tried to...
  20. A

    Convex mirror, reduced image, find radius of curvature

    Homework Statement A child holds a candy bar 16.5 cm in front of the convex side-view mirror of an automobile. The image height is reduced by one-half. What is the radius of curvature of the mirror? 1Your answer is incorrect. cm Homework Equations 1/f = 1/do + 1/di...
  21. Z

    Pulleys + Convex Mirror Reflection

    Homework Statement In the given arrangement pulley P1 and P2 are moving with constant speed vo downward and the centre of the pulley P lies on the principal axis of a convex mirror having radius of curvature R. Find the speed of image of pulley P when it is at a distance x from the surface...
  22. M

    Convex Mirror / Virtual Image

    Homework Statement The virtual image produced by a convex mirror is one-quarter the size of the object. b) What is the focal length of this mirror? Homework Equations 1/di = 1/f - 1/do The Attempt at a Solution i found di to be -9.3 cm but when i solved for f i keep getting it...
  23. N

    Convex Mirror Image Distance and Magnification

    Homework Statement At an intersection of hospital hallways, a convex mirror is mounted high on a wall to help people avoid collisions. The mirror has a radius of curvature of 0.510 m. -What is the image distance for a patient 11.9 m from the mirror? (Use the correct sign conventions.)...
  24. R

    Convex Mirror Image Calculation

    Convex mirror problem help?? Homework Statement a convex mirror has a focal length of 75cm. an object with a height of 2.0m is 6.0m from the mirror. a) what is the distance from the object's virtual image to the mirror? b) what is the height of the object's image? Homework Equations...
  25. L

    How Far is the Second Object from the Convex Mirror?

    Homework Statement An object is located 14 cm in front of a convex mirror, the image being 7 cm behind the mirror. A second object, twice as tall as the first one, is placed in front of the mirror, but at a different location. The image of this second object has the same height as the other...
  26. T

    How Do You Calculate Image Position and Magnification with a Concave Mirror?

    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...
  27. Alpha Russ Omega

    Reflecting glass and a convex mirror.

    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...
  28. B

    Discover the Focal Length of a Convex Mirror Using Object and Image Distance

    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)...
  29. N

    Radius of Curvature of Convex Mirror: -17.39 cm

    A real object is placed at the zero end of a meterstick. A large concave mirror at the 100 cm end of the meterstuck forms an image of the object at the 82.4 cm position. A small convex mirror placed at the 20 cm pisition form a final image at the 6.3 cm point. What is the radius of curvature of...
  30. Amith2006

    Image formed by a convex mirror

    Sir, I am posting these questions for the 3rd time as you didn't respond. Please respond. 1)A convergent beam of light is incident on a convex mirror of radius of curvature 60 cm as shown in figure. What is the nature and position of the image formed by it? I solved it in the following way...
  31. Amith2006

    Image formed by a convex mirror

    Sir, 1) A man 2 meters tall stands 5 meters in front of a large vertical plane mirror. What is the angle subtended by his image in the mirror at his eye? I solved it in the following way: Let AB represent the man and CE represent the mirror mounted on the wall.Here I am assuming that the...
  32. M

    Troubleshooting Convex Mirror: Image Distance & Magnification

    Hello everyone, I seem to be getting all the mirrors right that where concave but now i have a convex one and it doesn't seem to be working when im' finding the image distance and magnification/properties. Here is the problem: Heres my work: both the i and the m where wrong, i also tried...
  33. A

    Convex mirror, and you point a light at it horizontally

    If you have a convex mirror, and you point a light at it horizontally, does the light always reflect through the focal point? (the point halfway on the line connecting border and the center, parallel to the light's initial path) I remember learning this, but I think of a mirror in the shape...
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