Advertisements
Advertisements
Question
Two big mirrors A and B are fitted side by side on a wall. A man is standing at such a distance from the wall that he can see the erect image of his face in both the mirrors. When the man starts walking towards the mirrors, he find that the size of his face in mirror A goes on increasing but that in mirror B remains the same.
(a) mirror A is concave and mirror B is convex
(b) mirror A is plane and mirror B is concave
(c) mirror A is concave and mirror B is plane
(d) mirror A is convex and mirror B is concave
Solution
Image formed by a plane mirror is virtual, erect and of the same size as the object.
Image formed by a concave mirror is virtual,erect and larger than the object.
APPEARS IN
RELATED QUESTIONS
Which type of mirror has:
negative focal length?
If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror?
Give two uses of a convex mirror. Explain why you would choose convex mirror for these uses.
How will you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them?
The focal length of a convex mirror is equal to its radius of curvature.
A ............ mirror always forms a virtual image.
A convex mirror is used
The most common example of a convex mirror is the make – up mirror.
A convex rearview mirror is preferred over a plane mirror in a car. Why?
Match the following.
| Column I | Column II |
| Convex mirror | Radio telescopes |
| Parabolic mirror | Rear-view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
