PHYSICS [1 Mark Question Answer]

Name the mirrors shown in Figure (a) and (b).

State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give a reason to your answer.

State the kind of mirror used
(a) By a dentist,
(b) As a search-light reflector.

The focal length of a concave mirror is 10 cm. Find its radius of curvature.

How is the focal length of a spherical mirror related to its radius of curvature?

Name the kind of mirror used to obtain:
A real and diminished image.

Name the kind of mirror used to obtain:
A virtual and diminished image

Name the kind of mirror used to obtain:
A virtual and enlarged image

Name the kind of mirror used to obtain :
A real and enlarged image

Does the mirror mentioned in part (b) form real image for all locations of the object?

What type of mirror can be used to obtain a real image of an object?

What is a real image?

Write two more characteristics of the image.

State the position of object for which the image formed by a concave mirror is of same size.

State whether the image in part (a) is real or virtual?

For what position of object, the image formed by a concave mirror is magnified and erect?

The radius of curvature of a convex mirror is 40 cm. Find its focal length.

What is a spherical mirror?

Name the mirror which always produces an erect and virtual image. How is the size of image related to the size of object?

Two plane mirrors are placed making an angle θ° in between them. For an object placed in between the mirrors, if angle is gradually increased from 0° to 180°, how will the number of images change : increase, decrease or remain unchanged?

A light ray is incident normally on a plane mirror. (a) What is its angle of incidence?

Differentiate between the reflection of light from a plane mirror and that from a plane sheet of paper.

An insect is sitting in front of a plane mirror at a distance 1 m from it.
(b) What is the distance between the insect and its image?

An insect is sitting in front of a plane mirror at a distance 1 m from it.
(a) Where is the image of the insect formed?

State which surface of a plane mirror reflects most of the light incident on it: the front smooth surface or the back silvered surface.

What do you mean by reflection of light?

Why is it difficult to read the image of the text of a page formed due to reflection by a plane mirror?

How is the position of an image related to the position of the object?