General Physics Questions And Answers


Q1. 
Two concave mirrors have the same focal length but the aperture of one is larger than that of the other. Which mirror forms the sharper image and why?

Ans.
Concave


Q2. 
A man stands in front of a mirror of special shape. He finds that his image has a very small head, a fat body, and legs of normal size. What can we say about the shapes of the three parts of the mirror?

Ans.
Convex, Concave, Plane


Q3. 
Can the relative refractive index of a medium w.r.t. another medium be less than unity?

Ans.
Yes


Q4. 
Which of the following causes refraction of light?

Ans.
Change in the speed of light from one medium to another


Q5. 
Frequency and wavelength change when light passes from a rarer to a denser medium.

Ans.
False


Q6. 
Which of the following is a form of light whose photons share the same frequency and whose wavelengths are in phase with one another?

Ans.
Coherent sources


Q7. 
Which among the following is an example of coherent sources?

Ans.
LASER


Q8. 
Pick the odd one out.

Ans.
LED


Q9. 
Scattering of waves can be coherent and incoherent.

Ans.
True


Q10. 
Identify the factor is not the same for coherent waves.

Ans.
Amplitude