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

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Question 1 of 12

Physics

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

Visible radiation, gamma rays, radio waves

Gamma rays, microwave, visible radiation

Ultraviolet, infra-red microwaves

Radio waves, ultraviolet, X-rays

Question 1 of 12

Question 2 of 12

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

Frequency

Wavelength

Velocity

Amplitude

Question 2 of 12

Question 3 of 12

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

Amplitude

Velocity

Wavelength

Frequency

Question 3 of 12

Question 4 of 12

4. 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

Unchanged

Halved

Doubled

Quadrupled

Question 4 of 12

Question 5 of 12

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

Interference

Reflection

Diffraction

Polarization

Question 5 of 12

Question 6 of 12

6. 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 ?

2/3

2/1

3/2

½

Question 6 of 12

Question 7 of 12

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

Sound

Supersonics

Light

Ultrasonic

Question 7 of 12

Question 8 of 12

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

Reflection of light

Interference of light

Refraction of light

Diffraction of light d

Question 8 of 12

Question 9 of 12

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

Frequency

Speed of light

Amplitude

Wave front

Question 9 of 12

Question 10 of 12

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

Interference

Diffraction

Polarization

Refraction

Question 10 of 12

Question 11 of 12

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

Refraction

Diffraction

Interference

Polarization

Question 11 of 12

Question 12 of 12

12. 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:

1

1/6

2/3

1/3

Question 12 of 12

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