Light reflection and refraction Worksheet-22

Light reflection and refraction Worksheet-22

1. When a ray of light is incident normally on a surface separating two different optical mediums (having different refractive indices), then the transmitted ray suffers _____

A. deviation in its path                B. no deviation its path

C. Lateral displacement              D. Angular deviation

2. When a ray of light traveling in a optically rarer medium is incident obliquely on the surface of another optically denser medium, a ____ portion of light is reflected back into the same medium and _____ portion of light gets transmitted into the other medium.

A. Small, large                              B. Large, small

C. Small, small                             D. Large, large

3. A ray of light travelling in a optically denser medium is incident obliquely on the surface of another optically rarer medium. Ray gets completely reflected. Which of the following is true?

A. Angle of incidence is less than critical angle

B. Angle of incidence is more than critical angle

C. Angle of incidence is equal to critical angle

D. Such a situation is not possible

4. A ray of light travelling in a optically denser medium is incident obliquely on the surface of another optically rarer medium. Ray gets partly transmitted and partly reflected. Which of the following is true?

A. Angle of incidence = Angle of refraction

B. Angle of incidence > Angle of refraction

C. Angle of incidence < Angle of refraction

D. Angle of refration = Angle of reflection

5. When a ray of light travelling in a optically rarer medium is incident obliquely on the surface of another optically denser medium. Ray gets partly transmitted and partly reflected. Speed of light of the reflected ray ___

A. Increases      B. Decrease       C. Remains same

6. When a ray of light travelling in a optically rarer medium is incident obliquely on the surface of another optically denser medium. Ray gets partly transmitted and partly reflected. Speed of light of the transmitted ray ___

A. Increases      B. Decrease       C. Remains same

7. When a ray of light travelling in a optically denser medium is incident obliquely on the surface of another optically rarer medium. Ray gets partly transmitted and partly reflected. Which of the following does not change for the transmitted ray?

A. Frequency                                 B. Wavelength

C. Speed                                         D. Intensity

8. When a ray of light travelling in a optically denser medium is incident obliquely on the surface of another optically rarer medium. Ray gets partly transmitted and partly reflected. Speed of light of the transmitted ray ___

A. Increases      B. Decrease       C. Remains same

9. When a ray of light travelling in a optically denser medium is incident obliquely on the surface of another optically rarer medium. Ray gets partly transmitted and partly reflected. Speed of light of the reflected ray ___

A. Increases      B. Decrease       C. Remains same

10. In refraction, Critical Angle is defined for _____

A. given medium                          B. given pair of media

Answer Key:

1. B
2. A
3. B
4. C
5. C
6. B
7. A
8. A
9. C
10. B