REFLECTION OF LIGHT
QUESTION BANK WITH ANSWERS
ONE MARK QUESTIONS WITH ANSWERS
1. What is reflection of light?
Answer: Reflection of light is the bouncing back of light rays from a
surface.
2. State the first law of reflection.
Answer: Angle of incidence is equal to angle of reflection.
3. State the second law of reflection.
Answer: The incident ray, reflected ray and the normal lie in the same
plane.
4. What is regular reflection?
Answer: Reflection from a smooth surface is called regular reflection.
5. What is irregular reflection?
Answer: Reflection from a rough surface is called irregular reflection.
6. What is lateral inversion?
Answer: The left side appears right and the right side appears left in a
plane mirror.
7. What is a plane mirror?
Answer: A flat reflecting surface is called a plane mirror.
8. Name the two types of spherical mirrors.
Answer: Concave mirror and convex mirror.
, 9. What is the pole of a mirror?
Answer: The centre of the reflecting surface is called the pole.
10. What is principal axis?
Answer: The straight line passing through the pole and centre of curvature
is called principal axis.
11. What is centre of curvature?
Answer: The centre of the sphere of which the mirror forms a part is called
centre of curvature.
12. Define radius of curvature.
Answer: The distance between pole and centre of curvature is called
radius of curvature.
13. What is principal focus?
Answer: The point where reflected rays meet or appear to meet is called
principal focus.
14. What is focal length?
Answer: The distance between pole and principal focus is called focal
length.
15. Write the relation between radius of curvature and focal length.
Answer: R = 2f
16. Which mirror is used as rear-view mirror in vehicles?
Answer: Convex mirror.
17. Which mirror is used by dentists?
Answer: Concave mirror.
18. Which mirror forms erect and diminished image?
Answer: Convex mirror.
QUESTION BANK WITH ANSWERS
ONE MARK QUESTIONS WITH ANSWERS
1. What is reflection of light?
Answer: Reflection of light is the bouncing back of light rays from a
surface.
2. State the first law of reflection.
Answer: Angle of incidence is equal to angle of reflection.
3. State the second law of reflection.
Answer: The incident ray, reflected ray and the normal lie in the same
plane.
4. What is regular reflection?
Answer: Reflection from a smooth surface is called regular reflection.
5. What is irregular reflection?
Answer: Reflection from a rough surface is called irregular reflection.
6. What is lateral inversion?
Answer: The left side appears right and the right side appears left in a
plane mirror.
7. What is a plane mirror?
Answer: A flat reflecting surface is called a plane mirror.
8. Name the two types of spherical mirrors.
Answer: Concave mirror and convex mirror.
, 9. What is the pole of a mirror?
Answer: The centre of the reflecting surface is called the pole.
10. What is principal axis?
Answer: The straight line passing through the pole and centre of curvature
is called principal axis.
11. What is centre of curvature?
Answer: The centre of the sphere of which the mirror forms a part is called
centre of curvature.
12. Define radius of curvature.
Answer: The distance between pole and centre of curvature is called
radius of curvature.
13. What is principal focus?
Answer: The point where reflected rays meet or appear to meet is called
principal focus.
14. What is focal length?
Answer: The distance between pole and principal focus is called focal
length.
15. Write the relation between radius of curvature and focal length.
Answer: R = 2f
16. Which mirror is used as rear-view mirror in vehicles?
Answer: Convex mirror.
17. Which mirror is used by dentists?
Answer: Concave mirror.
18. Which mirror forms erect and diminished image?
Answer: Convex mirror.
