How is a rainbow formed?

Important Questions on Light Energy

MEDIUM

8th ICSE

IMPORTANT

Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q G

A ray of light is incident at an angle $\mathrm{i}$ on the surface of a glass slab. If its angle of refraction inside the glass block is $\mathrm{r}$, then find the relation between $\mathrm{i}$ and $\mathrm{r}$ assuming that light enters from the air and emerges into air.

EASY

8th ICSE

IMPORTANT

Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q G

Describe dispersion of white light. Why do different colours of light bend to different extents when passed through a prism?

MEDIUM

8th ICSE

IMPORTANT

Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q G

Explain why two prisms placed next to each other such that their adjacent faces are parallel, behave like a glass slab.

EASY

8th ICSE

IMPORTANT

Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H

Give reason for the following: Concave mirrors are also known as converging mirrors.

EASY

8th ICSE

IMPORTANT

Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H

Give reason for the following.
Concave mirrors used by dentists.

EASY

8th ICSE

IMPORTANT

Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H

Give a reason for the following. 
Convex mirrors preferred over plane mirrors as rearview mirrors in cars.

EASY

8th ICSE

IMPORTANT

Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H

Give reason for the following.
Stars twinkle in the sky.

EASY

8th ICSE

IMPORTANT

Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H

Give reason for the following.
The coin immersed in water appears to be raised.