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BITSAT 2019 Physics Optics Revision Quiz 2

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Question 1

If l₀ is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is doubled?

Question 2

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 3

If the first minima in a Young’s slit experiment occurs directly infront of one of the slits. (distance between slit & screen D = 12 cm and distance between slits d = 5 cm) then the wavelength of the radiation used is :

Question 4

Refractive index of a thin soap film of a uniform thickness is 1.34. Find the smallest thickness of the film that gives an interference maximum in the reflected light when light of wavelength 5360 Å falls at normal incidence

Question 5

A Young's double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is

Question 6

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 7

The two slits at a distance of 1 mm are illuminated by the light of wavelength

m. The interference fringes are observed on a screen placed at a distance of 1 m. The distance between third dark fringe and fifth bright fringe will be

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Oct 17JEE & BITSAT