Science help - light?

Question

I need hep with the following things. Answer the ones ypu can. Thanks.

What surfaces reflect light best?

What is the law of reflection?

What is refraction of light?

What is dispersion of light?

What is a spectrum? (please name the colours in order)

How do coloured light filters work?

Thankyou so much!!!!

Answer 1

What surfaces reflect light best?

Mirrors

What is the law of reflection?

The angle of incidence of a beam of light equals the angle of reflection. (a beam hitting a surface at a 37 degree angle will reflect at a 37 degree angle)

What is refraction of light?

Refraction is the bending of a wave when it changes speed.  Most often used to refer to light when it crosses a boundary between substances (like air to water, air to a prism, etc.)

What is dispersion of light?

The spreading of a beam of light into its component wavelengths due to refraction.  This is what makes a rainbow.

What is a spectrum? (please name the colours in order)

(infrared), red, orange, yellow, green, blue, indigo, violet/purple, (ultraviolet)

How do coloured light filters work?

They absorb all frequencies/wavelengths of light except the one desired (a blue filter absorbs all colors except blue).