(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

In the fig., PO is a ray of light incident on a rectangular glass block.
(a)   Complete the path of the ray through the block.
(b)  In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles I and r?
(c)  Mark angle of emergence by the letter e. How are the angles i and e related?
(d)  Which two rays are parallel to each other? Name them.
(e)  Indicate in the diagram the lateral displacement between the emergent ray and the incident ray.

Fig shows a lens as a combination of a glass block and two prisms.

(i) Name the lens formed by the combination.

(ii) what is the XX' called?

(iii) Complete the ray diagram and show the path of the incident ray PQ after passing through the lens.

(iv) The final emergent ray will either meet XX' at a point or appear to come from a point on XX'. what is the point called?

Fig shows a lens as a combination of a glass block and two prisms.

1. Name the lens formed by the combination.
2. What is the line XX' called?
3. Complete the path of the incident ray PQ after passing through the lens.
4. The final emergent ray either meets XX' at a point or appears to come from a point on XX'. Label it as F, What is this point called?

 Draw a diagram to show the splitting of white light into its constituent colours.

Fig. shows a ray of white light that passes through a prism and produces a spectrum.
(a) Name the phenomenon that is taking place.
(b) What colour would you see at X and Y?
(c) What radiation would you detect above X and below Y?

Make the correct for each of the following : 

With reference to the fig, the refractive index of the glass block is 

What do you mean by Atomic number

What do you mean by Mass number.

What do you mean by Atomic mass?