Light MCQs with Answers

Question-1. A smooth shining surface, which rebounds the light back in same or in different direction, is called

1. a mirror
2. a lens
3. reflection of light
4. point of incidence

Question-2. An owl can see clearly at night but not day time because it has

1. More rods and few cones
2. Less rod and more cones
3. More rods and more cone
4. Less rods and less cones

Question-3. Band of seven colours is called

1. VIBGYOR
2. spectrum
3. dispersion
4. reflection

Question-4. Beam of light striking the reflecting surface is called

1. reflecting ray
2. incident ray
3. refracted ray
4. normal ray

Question-5. Front balged part of the eyeball is called

1. cornea
2. choroid
3. pupil
4. retina

Question-6. If light falls perpendicularly on a plane mirror, what will be the angle in which it will be reflected?

1. 45°
2. 90°
3. 180°
4. 360°

Question-7. If the angle of incidence of light falling on a plane mirror is 30°, what will be the angle of reflection?

1. 90°
2. 60°
3. 30°
4. 0°

Question-8. In case of reflection of light, the angle of incidence (i) and the angle of reflection (r) are related as

1. i = r
2. i < r
3. i > r
4. no definite relation

Question-9. In our eye _______ cells can sense colour

1. Rod
2. Cone
3. Both rod and cone
4. Neither rod nor cone

Question-10. In the retina of the eye, the area having no sensory cells is called

1. iris
2. Blind spot
3. cornea
4. Dark spot

Question-11. Light enters the eye through

1. eye lens
2. pupil
3. cornea
4. retina

Question-12. Light passing through a prism splits into seven colours. This is called

1. Dispersion
2. Dissolution
3. Division
4. None of the above

Question-13. Myopia can be corrected by using a

1. concave lens
2. convex lens
3. opaque lens
4. micro lens

Question-14. Name the type of mirror used as a backview mirror.

1. Plane mirror
2. Concave mirror
3. Convex mirror
4. Any of these

Question-15. Rainbow is a natural phenomenon showing

1. Reflection
2. Deflection
3. Dispersion
4. Diversion

Question-16. The amount of light entering the eye is controlled by

1. eye lens
2. cornea
3. iris
4. ciliary muscle

Question-17. The defect due to which a person is not able to see the distant objects clearly:

1. Myopia
2. Hypermetropia
3. Cornea
4. Cataract

Question-18. The image formed by a camera and a simple microscope are respectively

1. real and real
2. real and virtual
3. virtual and virtual
4. virtual and real

Question-19. The splitting of white light into its seven constituent colours is called

1. refraction
2. dispersion
3. deviation
4. reflection

Question-20. To make a kaleidoscope we require

1. Three plane mirrors
2. Four plane mirrors
3. Three glass sheets
4. Four glass sheets

Question-21. Visually impaired people can read and write using

1. electronic writer
2. digital pens
3. braille system
4. hearing aids

Question-22. What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?

1. 60°
2. 45°
3. 90°
4. 180°

Question-23. When we stand in front of our dressing table, our left hand seems to be right and right seems to be left. This is called

1. Left-right confusion
2. Lateral inversion
3. Up -side down phenomenon
4. mirage

Question-24. Which of the following is not a luminous object?

1. sun
2. candle
3. moon
4. Tube light

Question-25. Which one of the following statements is correct regarding rods and cones in the human eye?

1. Cones are sensitive to dim light
2. Cones are sensitive to bright light
3. Rods are sensitive to bright light
4. Rods can sense colour