G7- Effects of Light

When the light from a car headlight falls on an object a -- and -- is formed

Various shades of colour are seen in the day or night sky due to -- of light

Why does the Sun appear red at sunset?

• Red light is the least scattered and travel the longer distance.

• Red light is the most scattered and travel the shorter distance.

• Red light is the least scattered and more blue light are scattered.

• All the components of white light are absorbed by the atmosphere except red light.

What source of light do you see in the given diagram?

• Point source

• Extended source

For a solar eclipse to occur, what has to happen?

• The sun must be directly between Earth and the moon.
• The moon must be directly between Earth and the Sun.

During a lunar eclipse

• Earth's shadow covers the moon

• the sun's shadow covers the moon

• the moon covers the sun

• Earth's shadow covers the sun

The position of the Earth, moon and Sun during a lunar eclipse is

• Sun--Moon--Earth

• Earth--Sun--Moon

• Sun--Earth--Moon

• Moon--Sun--Earth

What is the source of light in the given picture?

• Point source

• Extended source

In a point source which of the following can be seen?

• only umbra

• only penumbra

• umbra and penumbra

• none

In an extended source which of the following can be seen?

• only umbra

• only penumbra

• umbra and penumbra

• none