Mirror Image: Solving for Object Height & Location

In summary, the conversation discusses the determination of the object's position and height in a convex mirror given the image height, focal length, and distance from the mirror. The final answer for the object height is 7.5cm, understanding that a convex mirror always gives a reduced image. The focal length is also mentioned, with a reminder that it is negative for a convex mirror.
  • #1
myoplex11
45
0

Homework Statement



an image in a convex mirror is 12cm tall and 30cm from the mirror.IF the focal length is 50cm, where is the object and how tall.

Homework Equations



(1/f)=(1/do)+(1/di)
M= hi/ho =-di / do

The Attempt at a Solution


i got 7.5cm for the object height but a convex mirror always gives a reduced image?
 
Physics news on Phys.org
  • #2
Hi myoplex11,

It's difficult to follow since you did not post the actual numbers that you used.

However, I think the problem is that you either put in the incorrect image distance, or the incorrect focal length.
 
  • #3
here is my work:
(1/do)=1/50 - (-1/30)
do=18.75
ho= - (18.75/-30)*12 = 7.5
 
  • #4
Since this is a convex mirror, what do you know about the focal length?
 
  • #5
i am not sure
 
  • #6
oh yeah focul length is negative thanks.
 

What is the concept of mirror image in science?

The concept of mirror image in science refers to the phenomenon where an object appears to be flipped horizontally in a mirror, creating an image that is a reflection of the original object. This is due to the way light rays reflect off the mirror's surface.

How is the height of an object in a mirror image determined?

The height of an object in a mirror image can be determined using the mirror equation, which takes into account the distance between the object and the mirror, as well as the distance between the mirror and the observer. This equation is: 1/di + 1/do = 1/f, where di is the distance of the image from the mirror, do is the distance of the object from the mirror, and f is the focal length of the mirror.

What factors affect the location of an object in a mirror image?

The location of an object in a mirror image is affected by the distance between the object and the mirror, the angle at which the object is placed in front of the mirror, and the shape and curvature of the mirror's surface. These factors can alter the size and orientation of the image.

How can the size of a mirror image be changed?

The size of a mirror image can be changed by adjusting the distance between the object and the mirror. As the object moves closer to the mirror, the image will appear larger, and as it moves further away, the image will appear smaller. Additionally, using a concave or convex mirror can also alter the size of the image.

What is the difference between a virtual image and a real image in a mirror?

A virtual image is an image that appears to be located behind the mirror, while a real image is an image that can be projected onto a screen. Real images are formed by concave mirrors, while virtual images are formed by convex mirrors. Both types of images are created by reflected light rays, but they differ in their location and ability to be projected.

Similar threads

  • Introductory Physics Homework Help
Replies
5
Views
449
  • Introductory Physics Homework Help
Replies
7
Views
1K
  • Introductory Physics Homework Help
Replies
3
Views
4K
  • Introductory Physics Homework Help
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
1
Views
874
  • Introductory Physics Homework Help
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
1
Views
1K
  • Introductory Physics Homework Help
Replies
3
Views
3K
  • Introductory Physics Homework Help
Replies
5
Views
2K
  • Introductory Physics Homework Help
Replies
3
Views
1K
Back
Top