Light reflection and refraction Worksheet-23

Light reflection and refraction Worksheet-23

 

  1. Absolute refractive index of vacuum is taken as

A. More than unity                       B. Less than unity

C. Exact unity                                D. Infinity

 

  1. When two optical media are compared, the one with _____ refractive index is termed optically ____.

A. higher, denser

B. lower, denser

C. higher, rarer

 

  1. When two optical media are compared, the one with _____ refractive index is termed optically ____.

A. higher, denser

B. lower, rarer

C. higher, rarer

 

  1. Absolute refractive index of a medium ____upon _____ in wavelength of light

A. Decreases, increase

B. Decreases, decrease

C. Increases, increase

 

  1. While studying refraction of light through a rectangular glass slab, it is seen that emergent ray is parallel to the incident ray but suffers ____ from the path of incident ray.

A. Longitudinal displacement

B. Laterally displacement

C. Angular deviation

 

  1. While studying refraction of light through two rectangular glass slabs (same refractive index), one being thicker than the other, it is seen that emergent ray is parallel to the incident ray (laterally displaced). Amount of lateral displacement is

A. More for thicker                      B. Less for thicker

C. Same for both                          D. None of these

 

  1. Which of the following light will give the highest refractive index of the glass used in the experiment?

A. Red                B. Green             C. Orange          D. Violet

 

  1. Total internal reflection is an optical phenomenon that happens when a ray of light is incident on a boundary separating two mediums at an angle larger than critical angle. Which of the following does not affect the critical angle

A. Wavelength of light

B. Nature of pair of media

C. Intensity of light

 

  1. Total Internal Reflection (TIR) is a phenomenon, wherein a ray of light gets totally reflected at the separation of two optical media. TIR can be observed only if

A. Light is traveling in a denser medium and angle of incidence is equal to critical angle

B. Light is traveling in a denser medium and angle of incidence is more than critical angle

C. Light is traveling in a rarer medium and angle of incidence is equal to critical angle

D. Light is traveling in a rarer medium and angle of incidence is more than critical angle

 

  1. Endoscope is an instrument used to examine the interior of a hollow organ or cavity of the body for medical reasons. Endoscope is essentially a flexible tube containing optical fiber cable, which is inserted directly into the organ. Optical fiber cable works on the principle of ____.

A. Atmospheric refraction

B. Total internal reflection

C. Lateral displacement

 

Answer Key:

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