Optics Answers

A two-slit interference experiment is set up, and the fringes are displayed on a screen.

Then the whole apparatus is immersed in the nearest swimming pool. How does the fringe pattern change?

Polarizer and analyzer are set with their polarizing directions parallel so that the intensity of transmitted light is maximum. Through what angle should either be turned so that the intensity is reduced to 80 % of the maximum intensity?

Which is a more precise measuring tool : ruler or Vernier Caliper? Why?

A boy stands 42.35 m in front of a flat mirror, how far away from him will his image be in the mirror?

An orange and a red ray of light travels through vacuum before hitting a plane mirror also residing in the vacuum. Which of the following statements is/are true?

An object is placed 20cm from a converging lens. If the real image formed is 80.0cm from the object, the focal length of the lens is

An object is placed 20cm from a converging lens if the real image formed is 80.0cm from the object, the focal length of the lens is ?

Blue light leaves a Vacuum (the first medium) and enters a second medium. Which of the following second medium will result in the 2nd greatest amount of bending from the original light path?

a. Vacuum

b. Glass

c. Empty space

d. Diamond

e. Air

f. Water

Which of the fulling results when a wave moves from a medium of a low refractive index to a medium of higher refractive index

a. The wavelength increases

b. The wavelength decreases

c. The wave speed increases

d. Its rays bend away from the normal

e. Its rays bend towards the normal

f. Its rays experience are refracted by exactly 90 es

g. Its rays experience Total Internal Reflection

An object of height 19.7 cm is placed 23.6 cm from a convex lens. What is the angular size of this object?