Quiznetik

Light | Set 1

1. If the angle of incidence of light falling on a plane mirror is 30degree, what will be the angle of reflection?

A. 90 degree

B. 60 degree

C. 30 degree

D. 0 degree

Correct : C. 30 degree

2. Whe we stand in front of our dressing table, our left hand seems to be right and right seems to be left. This is called

A. Left-right confusion

B. Lateral inversion

C. Up -side down phenomenon

D. mirage

Correct : B. Lateral inversion

3. Light passing through a prism splits into its colour. This is called

A. Dispersion

B. Dissolution

C. Division

D. None of the above

Correct : A. Dispersion

4. Rainbow is a natural phenomenon showing

A. Reflection

B. Refraction

C. Dispersion

D. Diversion

Correct : C. Dispersion

5. In the retina of the eye, the area having no sensory cells is called

A. iris

B. Blind spot

C. cornea

D. Dark spot

Correct : B. Blind spot

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

A. 45 degree

B. 90 degree

C. 180 degree

D. 360 degree

Correct : B. 90 degree

7. Which of the following is not luminous object?

A. sun

B. candle

C. moon

D. Tube light

Correct : C. moon

8. To make a kaleidoscope we require

A. Three plane mirrors

B. Four plane mirrors

C. Three glass sheets

D. Four glass sheets

Correct : A. Three plane mirrors

9. In our eye _______cells can sense colour

A. Rod

B. Cone

C. Both rod and cone

D. Neither rod nor cone

Correct : C. Both rod and cone

10. An owl can see clearly at night but not day time because it has

A. More rods and few cones

B. Less rod and more cones

C. More rods and more cone

D. Less rods and less cones

Correct : A. More rods and few cones