# ICSE Worksheet for Chapter - 2 Light Class 8

## Find ICSE Worksheet for chapter-2 Light class 8

1. CLASS-8
2. BOARD: ICSE
3. PHYSICS Worksheet - 2
4. TOPIC: Light
5. For other ICSE Worksheet for class 8 Science check out main page of Physics Wallah.

#### SUMMARY

• Introduction, Refraction, Speed of light & optical density of a medium, Laws of refraction
• Refractive Index, Refraction through a glass slab, Refraction through a prism
• Dispersion of white light through a prism, Effects of refraction

#### SECTION I – OBJECTIVE

1. The speed of light in air or vacuum is
1. 3*108 m/s
2. 2.25*108 m/s
3. 332 m/s
4. 2.8*108 m/s
2. The ray of light moving from an optically rarer to denser medium
1. Bends away from the normal
2. Bends toward the normal
3. Remains undeviated
4. None of these
3. The angle between normal and refracted ray is called
1. Angle of deviation
2. Angle of incidence
3. Angle of refraction
4. None of these
4. The property of splitting of white light ray into its seven constituent colours is known as:
1. Spectrum
2. Refractive index
3. Reflection
4. Dispersion
5. For a white light ray, the colour which disperses the least is
1. Violet
2. Red
3. Orange
4. None of these
6. Rainbows are formed due to
1. Reflection of light
2. Refraction of light
3. Dispersion of light
4. Rectilinear propagation of light
7. The seven colours obtained on a screen are called as
1. Dispersion
2. Spectrum
3. Scattering
4. Reflection
8. The angle between any two refracting surfaces of a prism is called the angle of
1. Reflection
2. Prism
3. Refraction
4. None of these
9. Light is a form of
1. Energy
2. Power
3. Force
4. None of these
10. Between water and glass……………. is the denser medium
1. Water
2. Glass
3. Both
4. None of these

#### SECTION II – SUBJECTIVE

1. Define refraction of light.
2. State the laws of refraction.
3. Find the refractive index of material, if angle of incidence of ray of light is 45° and angle of refraction in the material is 30°.
4. Define refractive index.
5. State and explain Snell’s law
6. Find the velocity of light in glass and water, given that the refractive index of glass is 1.5, and that of water is 1.33. Velocity of light in vacuum is .

### Solutions: to worksheet-2 Topic- Light

#### Objective Problems:

 1. (A) 2. (B) 3. (C) 4. (D) 5. (B) 6. (B) 7. (B) 8. (B) 9. (A) 10. (B)