Physics Term 4 Light

Question 1

What is light

Answer 1

light is a form of energy that travels as an electromagnetic wave.

Question 2

Define the term ‘electromagnetic spectrum’

Answer 2

range of all types of electromagnetic radiation.

Question 3

Identify the characteristics of a light wave amplitude (brightness), wavelength and frequency (color).

Answer 3

Amplitude increases the brightness
Wavelength and frequency changes the colour

Question 4

Recall that light can be monochromatic or polychromatic.

Answer 4

Monochromatic: Only one single wavelength (one colour)

Polychromatic: Multiple wavelengths (visible light)

Question 5

Recognize the effect of obstacles on light (ie. absorbed, transmitted, reflected).

Answer 5

Light can be absorbed, transmitted or reflected

Absorb: go in but doesn’t come out so its in forever (👉👌)

Transmitted: Go through (light go through glass)

Reflected: Like mirror light bounces off