LIGHT

Objects that do not emit light of their own is called

• Luminous object

• Non-Luminous object

Animal and microorganisms are capable of producing light from their body by chemical reaction is called

(a)  

What is the speed of light in air or vacuum ?

• 30,000 km/s

• 4,00,000 km/s

• 3,00,000 km/s

Sun is (a)   kilometers away from the earth

Material that allows light to pass through easily

• Translucent objects

• Opaque objects

• Transparent objects

Identify the picture

• Parallel Beam of light

• Convergent Beam of light

• Divergent Beam of light

Light travels in straight line as long as it is travelling in the same medium. This property of light is called (a)  

Moon is a Luminous object

• True

• False

A (a)   is formed when an opaque object blocks the path of light.

A shadow generally consists of two regions - a central dark region is called ____________ and an outer less dark region is called ________________

• Penumbra and Umbra

• Umbra and Penumbra