T/F: Bioluminescence is light produced by a living organism.

The distance from one peak of a light wave to the next is known as the:

Which of these types of waves has the LONGEST wavelength, but SHORTEST frequency?

T/F: Light that is emitted from a source, that strikes an object, is known as incident light.

When an object does not allow any light to pass through, it is:

T/F: Lasers produce electromagnetic waves of many energy levels and colours simultaneously.

The transparent outer surface layer of your eye that allows light to pass through it:

T/F: The pupil is created by a circular band of muscle called the iris.

T/F: Your eye includes a concave lens.

Which of the following are NOT a photoreceptor found in the retina?

T/F: Rod cells help us detect shapes and movement in low light situations

People who can see distant objects clearly, but cannot see near objects clearly, are:

People who have difficulty focussing on the horizontal lines in 'E' and 'F' are experiencing: