Physical Optical Physics MCQs

1. Who proposed the wave nature of light?
(A) Fresnel
(B) Huygen
(C) Thomas
(D) Maxwell

2. A corpuscular theory was proposed by Newton on the basis of
(A) Dispersion of white light
(B) Newton's rings
(C) Rectilinear property of light
(D) Planarization

3. How much time does light take to reach from Sun to Earth?
(A) 29 minutes
(B) 5 minutes
(C) 30 minutes
(D) 15 minutes

4. Who explained the photo-electric effect?
(A) Rutherford
(B) Planks
(C) Hertz
(D) Einstein

5. Where is Huygen's principle used?
(A) Find the index of refraction
(B) Explain polarization
(C) Locate waveform
(D) Speed of light

6. What happens when a white light beam passes through a prism?
(A) Dispersed
(B) Polarized
(C) Deviated
(D) Diffracted

7. Which one of the following is correct when a ray of light enters glass from air?
(A) Frequency increases
(B) Wavelength increases
(C) Frequency decreases
(D) None of these

8. Why is the color of the sky blue?
(A) Due to polarization
(B) Due to scattering
(C) Due to diffraction
(D) Due to reflection

9. In the daytime, there is light inside the room due to
(A) Refraction
(B) Interference
(C) Diffraction
(D) Polarization

10. How do we define a polaroid?
(A) It is an adjustable shutter
(B) It is the device used in a polarimeter
(C) It is used for analyzing polarized light
(D) It is a light filter

11. Which form of light reaches from the Sun to Earth?
(A) Cylindrical wavefronts
(B) Plane wavefronts
(C) Circular wavefronts
(D) None of these

12. Why do we use beats?
(A) Find wavelength
(B) Find frequency
(C) Find displacement
(D) Find intensity