Waves and the Visible Spectrum

What is the amplitude of the wave below?

What does a Polaroid film do?

What are the primary colours of the visible spectrum?

What type of wave does musical instruments make?

What is the first colour in the visible spectrum? (low frequency)

If white light traveled through a red filter, what colour would pass through?

When white light is shone on a red apple what colour is reflected?

When every colour is shone on a backing board what colour is produced? 

What type of wave is the wave below?

Fill in the gap. It is the ____ of the colours in the VS that makes us see different colours

What is the wavelength of the wave below?