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JEE 2020 Physics: Wave Optics Quiz 3 (30.08.2019)

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Question 1

Which of the following is correct with respect to Young’s double slit experiment when a white light is used in place of monochromatic light?

Question 2

A double slit experiments is performed with light of wavelength 500 nm. A thin film of thickness 2 and refractive index 1.5 is introduced in the path of the upper beam. The location of the central maximum will

Question 3

In Young’s double slit experiment, the path difference between two interfering waves at a point on screen is 13.5 times the wavelength. The point is:

Question 4

In Young’s double slit experiment, the separation of the two slits is doubled. To keep the same spacing of fringes, the distance D of the screen from the slits should be made

Question 5

In a Young’s double slit experiment, slits are separated by 0.5 mm, and the screen is placed 150 cm away. A beam of light consisting of two wavelengths, 650 nm and 520 nm, is used to obtain interference fringes on the screen. The least distance from the common central maximum to the point where the bright fringes due to both the wavelengths coincide 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

A plane polarized light passed through successive polarizers which are rotated by 30 with respect to each other in the clockwise dierection. Neglecting absorption by the polarizers and given that the first polarizer’s axis is parallel to the plane of polarization of the incident light, the intensity of light at the exit of the fifth polarizer is closest to

Question 8

If the two slits in Young’s double slit experiment are of unequal width; then

Question 9

For sustained interference fringes in double slit experiment, essential condition/s is/are
(1) sources must be coherent.
(2) the intensities of the two sources must be equal.
Here, the correct option/s is/are
Which of the above statements are correct?

Question 10

Which of the following phenomena support the wave theory of light?
1. Scattering
2. Interference
3. Dffraction
4. Velocity fo light in a denser medium is less than the velocity of light in the rarer medium
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