# Punjab 11th Class Physics Chapter 9 Physical Optics Mcqs Test Online

 Total Question 12 Questions Total Marks 24 Marks Total Time 12 Minuts
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### Test Name

 Ch.9 # Physical Optics

### Subject

 Physics (11th Class)

 Mcqs

# Punjab 11th Class Physics Chapter 9 Physical Optics Mcqs Test Online

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Question 1 of 12

## Physics

1. Signal from a remote control to the device operated by it travels with the speed of:

Question 1 of 12

Question 2 of 12

2. Light of wavelength λ is incident normally on a diffraction grating for the slit spacing is equal to 3λ. What is the sin θ of the angle between the second order maximum and the normal:

Question 2 of 12

Question 3 of 12

3. Two monochromatic radiating X and Y are incident normally on a diffraction grating. The second order intensity maximum for X coincides with the third order intensity maximum for Y.
What is the ratio wavelength X/wavelength Y ?

Question 3 of 12

Question 4 of 12

4. The principle of Michelson interferometer is based on the division of

Question 4 of 12

Question 5 of 12

5. Which one of the following properties of light does not change when it enters from one medium to another medium?

Question 5 of 12

Question 6 of 12

6. In the Young’s double slit experiment the separation between the slits is halved and the distance between the slits and the screen is double. The fringe width is

Question 6 of 12

Question 7 of 12

7. Which one of the following properties proves the transverse wave nature of light.

Question 7 of 12

Question 8 of 12

8. Coloured fringes observed in soap bubbles are the examples of

Question 8 of 12

Question 9 of 12

9. During a sunny day we see the objects in a class room even when all the electric lights are off, due to:

Question 9 of 12

Question 10 of 12

10. The tip of a needle does not give a sharp image. It is due to

Question 10 of 12

Question 11 of 12

11. Which of the following three regions of the electromagnetic spectrum in order of increasing wavelength, visible radiation.

Question 11 of 12

Question 12 of 12

12. The principle of Young’s double slits experiment is based on the division of:

Question 12 of 12

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