Which model places the Sun at the centre of the solar system?

Who proposed the heliocentric model?

What did Galileo discover and what theory did it support?

What two types of waves do non luminous objects emit?

What invention allowed the discovery of Uranus, Neptune and Pluto?

What does the eyepiece of a telescope do?

What is another name for a converging lens?

Define focal length

What happens to waves at boundaries between different materials?

What two things happen to a wave when it meets a boundary between different materials?

What can you do to a real image?

State two factors that affect the magnification of a converging lens.

What does a reflecting telescope have that a refracting telescope does not?

How can you change about the primary mirror to make the image brighter?

What do waves transfer?

Define frequency.

Define wavelength

Define amplitude

What type of wave are electromagnetic waves?

What type of wave are sound waves?

What type of waves can be both longitudinal and transverse?

If a wave carries a surfer 52m in 8 seconds, what is the wave speed? Show your working.

If a wave has a wavelength of 13m and has a frequency of 0.5Hz, what is its speed? Show your working.