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JEE 2020 Revision Quiz: Wave Optics
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Question 1
In Young’s double slit experiment when wavelength used is 6000 Å and the screen is 40 cm from the slits, the fringes are 0.012 cm apart. What is the distance (in cm) between the slits?
Question 2
A mixture of light, consisting of wavelength 590 nm and an unknown wavelength, illuminates Young's double slit and gives rise to two overlapping interference patterns on the screen. The central maximum of both lights coincide. Further, it is observed that the third bright fringe of known light coincides with the 4th bright fringe of the unknown light. From this data, the wavelength of the unknown light is:
Question 3
In a certain double slit experimental arrangement, interference fringes of width 1.0 mm each are observed when light of wavelength 5000 Å is used. Keeping the set-up unaltered if the source is replaced by another of wavelength 6000 Å, the fringe width (in mm) will be -
Question 4
Unpolarized light of intensity I0 is incident on surface of a block of glass at Brewster’s angle. In that case, which one of the following statements is true?
Question 5
When an unpolarized light of intensity lo is incident on a polarizing sheet, the intensity of the light which does not get transmitted is
Question 6
Young’s double slit experiment is made in a liquid. The 10th bright fringe in liquid lies where 6th dark fringe lies in vacuum. The refractive index of the liquid is approximately:
Question 7
In Young’s double slit experiment, one of the slit is wider than other, so that the amplitude of the light from one slit is double of that from other slit. If Im be the maximum intensity, the resultant intensity I when they interfere at phase difference ϕ is given by
Question 8
Yellow light emitted by sodium lamp in Young's double slit experiment is replaced by the monochromatic blue light of the same intensity-
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May 27JEE & BITSAT
