Engineering Physics II Mock Test 2

10%

Question 1 of 10

1. Two narrow and parallel slits 0.08 cm apart are illuminated by a light of frequency 6 X 10¹¹ kHz. At what distance from the slits should the screen be placed to obtain fringe width of 0.6 mm?

1.06 m

1.28 m

1.74 m

0.98 m

Question 1 of 10

Question 2 of 10

2. The visibility of fringes is given by the expression ___________

l_min/l_max

l_min + l_max / l_min - l_max

l_max/l_min

l_min - l_max / l_min + l_max

Question 2 of 10

Question 3 of 10

3. Zero order fringe can be identified using ____________

Yellow light

Monochromatic light

Achromatic light

White light

Question 3 of 10

Question 4 of 10

4. The shape of the pattern depends on the ____________

Distance between the slits

Wavelength of light

Distance between the slits and the screen

Shape of the slit

Question 4 of 10

Question 5 of 10

5. The interference pattern of soap bubble changes continuously.

False

True

Question 5 of 10

Question 6 of 10

6. Interference is observed only when the phase difference between the two waves is zero.

False

True

Question 6 of 10

Question 7 of 10

7. When a thin plate of refractive index 1.5 is placed in the path of one of interfering beams of Michaelson Interferometer, a shift of 30 fringes is observed. If the thickness of plate is 0.018 mm, the wavelength of the used light is ___________

6000 Å

7000 Å

5000 Å

4000 Å

Question 7 of 10

Question 8 of 10

8. Which color appears at the top when white light is incident on a glass prism?

Indigo

Violet

Red

Yellow

Question 8 of 10

Question 9 of 10

9. The radius of the half period zone is proportional to ___________

The square root of the frequency of light

The square root of the wavelength light

The frequency of light

The wavelength of light

Question 9 of 10

Question 10 of 10

10. A grating has 16000 per inch over a length of 5 inches. What will be the smallest wavelength difference for a light of wavelength 6000 Å?

0.01 Å

0.04 Å

0.02 Å

0.03 Å

Question 10 of 10