Light reflection and refraction Worksheet-33

Light reflection and refraction Worksheet-33

21. We can see the sun about two minutes before the actual sunrise and two minutes after the actual sunset. Which phenomenon of light is attributed to advanced sunrise and delayed sunset.

A. Reflection of the light

B. Refraction of the light

C. Scattering of the light  

D. Dispersion of the light

22. In the formation of a rainbow light from the sun on water droplets undergoes

A. Dispersion only

B. Only total internal reflection

C. Dispersion and total internal reflection

D. None of these

23. When white light enters a prism, it gets split into its constituent colours.  This is because of

A. High density of prism material

B. different μ and so different l

C. Diffraction of light

D. Velocity change for different frequencies

24. Dispersion of light is due to

A. Wavelength                               B. Intensity of light

C. Density of medium                  D. None of these

25. Colour of the sky is blue due to

A. Scattering of light                   B. Total internal reflection

C. Dispersion of light                  D. Diffraction of light

26. An astronaut in a spaceship see the outer space as

A. White             B. Black              C. Blue                D. Red

27. A cut diamond sparkles because of its

A. Hardness

B. High refractive index

C. Emission of light by the diamond

D. Absorption of light by the diamond

Answer Key:

21. B

       Explanation:

22. C
23. B
24. A
25. A
26. B
27. B