1. Light Light is a form of energy
Energy has the ___________ to do _________
Light travels in ________________
These waves travel in a __________ ________

2. Light and sound travel as waves
Waves can be described by their___________, _____________ and _______________.

3. Amplitude
The amplitude of a wave is its _________________________________________
The amplitude of a light wave is its _____________
The amplitude of any electromagnetic wave is its ____________.

4. Wavelength
The wavelength of a wave is the distance between a point on one wave and the same point on the next wave, eg. ______ to ______
Wavelength of visible light is it’s _________. R O Y G B I V

5. Colour RED has the ______________ wavelength.
Violet has the _____________wavelength.
Outside of these limits “light” would be invisible to the eye.

6. Electromagnetic radiation
Wave length determine what type of wave it is. From long to short they are:
Radio waves, microwaves, heat waves, visible light, ultraviolet, x-rays, gamma rays.

7. Shorter waves
Carry more ________and can _____________ through stuff. But they can’t travel very ______.
Long waves carry ________energy, they can’t penetrate stuff. But they can _______________.

8. Frequency The frequency of a wave is
The ________ of waves passing by in __________
The _______ of frequency is the __________(__)
Frequency and wavelength are related.
Shorter wavelength mean _________ frequencies.
Longer wavelengths mean _________ frequencies

9. Transverse waves
Light and the electromagnetic spectrum use these wave.
Because they are not made of vibrating particles they can ______________________. They do not need a medium. So they _______through ____________.
They are very fast __________________in the air

10. Compression or longitudinal waves
Sound waves are like this.
Compression waves must travel through a substance (_____________________) called a medium.
One _________ hits another _________, which hits another, passing___________along.
Because sound waves depend on moving objects (molecules) they are ___________________.
Less than _________________in the air

11. This is why you see the lightening
Before you hear the thunder