Engineering Physics II Practice Test 2

1. Which graph is shown in the figure?

2. The shape of the fringes observed in interference is ____________

3. The refractive index of a parallel glass slab is 1.57. A light, from medium Y, is incident on the glass slab. If the angle of incidence is 37°, then the angle of emergence, when the light emerges back to medium Y, is ____

4. The interference pattern of soap bubble changes continuously.

5. 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?

6. An electron makes a transition from n = 7 state to n = 3 state in the hydrogen atom. What is the frequency of the emitted photon?

7. A screen is placed 2m away from the lens to obtain the diffraction pattern in the focal plane of the lens in a single slit diffraction experiment. What will be the slit width if the first minimum lies 5 mm on either side of the central maximum when plane light waves of wavelength 4000 Å are incident on the slit?

8. The main principle used in Interference is _____________

9. During a straight-edge diffraction experiment, a light of wavelength 400 nm was used. What would be the position of the first minimum, if the separation between the edge and the source is 10 cm while that between the edge and eyepiece is 2 m?

10. In Young’s Double Slit Experiment, if instead of monochromatic light white light is used, what would be the observation?