Mirror Formula Examples
Trending Questions
An object is placed at a distance of 10 cm from a convex mirror of a focal length of 15 cm. Find the position and nature of the image.
A square of side 3 cm is placed at a distance of 25 cm from a concave mirror of a focal length of 10 cm. The center of the square is at the axis of the mirror and the plane is normal to the axis. The area enclosed by the image of the square is
36cm2
6cm2
16cm2
4cm2
A convex mirror of radius of curvature forms an image which is half the size of the object. Determine the position of the object from the pole of the mirror.
An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is
-30 cm
30 cm
-15 cm
15 cm

- 2f3
- f3
- f
- None of these
Find the diameter of the image of the moon formed by a spherical concave mirror of focal length 7.6 m. The diameter of the moon is 3450 km and the distance between the earth and the moon is 3.8×105 km
- 25 cm
- 20 cm
- 12.5 cm
- 50 cm
Use the mirror equation to deduce that:
(a) an object placed between f and 2f of a concave mirror produces a real image beyond 2f.
(b) a convex mirror always produces a virtual image independent of the location of the object.
(c) the virtual image produced by a convex mirror is always diminished in size and is located between the focus and the pole.
(d) an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.
[Note: This exercise helps you deduce algebraically properties of
images that one obtains from explicit ray diagrams.]