# physics

posted by .

an object is placed 10 cm from a concave spherical mirror whose radius of curvature is 12 cm. What is the distance of image

a) 5cm
b) 10 cm
c)15cm
d)20cm
e)24cm

• physics -

The focal length is f = R/2 = 6 cm.
1/do + 1/di = 1/10 + 1/di = 1/6
1/di = 1/6 - 1/10 = 5/30 -3/30
= 1/15
image distance di = 15 cm
object distance do = 10 cm

## Similar Questions

1. ### physics

An object whose height is 3.5 cm is at a distance of 8.5 cm from a spherical concave mirror. Its image is real and has a height of 11.2 cm. Calculate the radius of curvature of the mirror. How far from the mirror is it necessary to …
2. ### physics

An object whose height is 3.5 cm is at a distance of 8.5 cm from a spherical concave mirror. Its image is real and has a height of 11.2 cm. Calculate the radius of curvature of the mirror. How far from the mirror is it necessary to …
3. ### Physics

-An object whose height is 5.8 cm is at a distance of 9.5 cm from a spherical concave mirror. Its image is real and has a height of 9.2 cm. Calculate the radius of curvature of the mirror. I got 0.1165 m for my answer. -How far from …
4. ### physics

A spherical convex mirror has a radius of curvature of magnitude of 20cm. At what distance from the mirror should an object be placed to obtain an image that is virtual, four times smaller and upright.
5. ### physics

A concave spherical mirror has a radius of curvature 15 cm. A 1 cm tall bulb is placed in front of the mirror such that its image is formed 10 cm in front of the mirror. If you measure distance from the optic center of the mirror, …
6. ### physics ---

A concave spherical mirror has a radius of curvature 15 cm. A 1 cm tall bulb is placed in front of the mirror such that its image is formed 10 cm in front of the mirror. If you measure distance from the optic center of the mirror, …
7. ### physics

A 4.5 cm tall object is placed 20 cm in front of a spherical mirror. It is desired to produce a virtual image that is upright and 3.5 cm tall. (a) What type of mirror should be used?
8. ### physics

an object of height 5cm is placed 20cm in front of a concave mirror of radius of curvature 20cm by graphical method, find image distance from the mirror
9. ### physics (mirrors)

An object is placed from a concave mirror with a radius of curvature of 50cm. The object has a height of 5cm. a)Calculate the focal lenght of the mirror. b)Calculate the position of the image formed by the mirror. Is the image real …
10. ### physics

an object 5cm lenght is placed at distance of 20cm in front of a convex mirror of radius of curvature 30 cm . find the position of the image

More Similar Questions