Engineering Physics II Practice Test 3

1. The following pattern was observed by a plane diffraction grating. How are the two images resolved?

2. In x lenses are used in Fraunhofer diffraction and y in Fresnel Diffraction, x – y is ________

3. An unpolarized light can be polarized by __________

4. The phenomenon used for obtaining grating spectra is diffraction. Which phenomenon is used for obtaining prism spectra?

5. The following intensity variation graph is for _____________

6. The surface of calculation for Fraunhofer and Fresnel diffraction patterns are respectively __________

7. Which of the following lines represent the resolution of a prism?

8. Light of 4000 Å is incident on a circular hole of radius 3 cm. How many half-period zones are contained in the circle if the screen is placed at a distance of 0.5 m?

9. A tube of length 20cm containing a 10% sugar solution rotates the plane of polarization by 13.2°. What is the specific rotation of sugar solution?

10. What is the relation between the dispersive power, D, of a grating and the order, n, of a spectrum?