﻿ Class 10 Reflection of light test paper unsolved

# Reflection of light test paper (unsolved)

### Fill in the blanks

1. Image formed by a plane mirror is always …………………. and ………………….
2. A spherical mirror, whose reflecting surface is curved inwards, that is, faces towards the centre of the sphere, is called a …………………….
3. The focal length of a spherical mirror is equal to ……………… its radius of curvature.
4. Speed of light is ………………….
5. Light rays always travels in …………………………….

### One marks questions

1. State the laws of reflection of light.
2. A concave mirror produces three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Where is the image located?
3. The magnification produced by a plane mirror is +1. What does this mean?
4. An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image.
5. Define the principal focus of a concave mirror.

### Three marks questions

1. Draw ray diagrams showing the image formation by a convex mirror when an object is placed at infinity
2. Under what condition in an arrangement of two plane mirrors, incident ray and reflected ray will always be parallel to each other, whatever may be angle of incidence. Show the same with the help of diagram.
3. A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. Find the focal length of this mirror.
4. Name the type of mirror used in the following situations.