Colorful World

Question 1

What is a spectrum?

Answer 1

Band of colors of a light beam

Question 2

What is dispersion?

Answer 2

The Splitting of light into its constituent colours

Question 3

Which color bends the most in dispersion of white light?

Answer 3

Violet

Question 4

What is white light?

Answer 4

Any light that gives a spectrum

Question 5

Which has less refractive index – the air is just about fire or far away from fire?

Answer 5

Just above fire

Question 6

The star appears ____ than it’s actual position when viewed near the horizon

Answer 6

Higher

Question 7

Planets are ___ sources and stars are ___ sources

Answer 7

Extended, point sized

Question 8

Which is the colour of shortest wavelength?

Answer 8

Blue

Question 9

Which is the colour of longest wavelength

Answer 9

Red

Question 10

Very fine particles scatter___ wavelength colour

Answer 10

Short

Question 11

If the size of the scattering particles is very large then scattered light may even appear as

Answer 11

White

Question 12

The red light has a wavelength about___times greater than blue light

Answer 12

1.8

Question 13

Why are danger signal lights in red colour

Answer 13

Because read is least scattered by fog or smoke