What does this diagram show?
A continuous emission spectrum
A line emission spectrum
A line absorption spectrum
What produces this type of diagram?
A hot gas
A cool gas
A cool gas with a hot continuous spectrum source behind it
What is a continuous emission spectrum?
All wavelengths of visible light
Bright lines on a dark background
Dark lines on a continuous spectrum
A police car has its siren on, and is travelling towards you. You listen to the sound. What do you notice?
It sounds higher pitched
It sounds lower pitched
There is no change in pitch
A driver of a car on the same road as a police car with its siren on hears no difference in the pitch of the siren. Why is this?
Both cars are travelling in the same direction at the same speed
Both cars are travelling in the opposite direction at the same speed
Both cars are parked, the police car is moving away
A teacher swings a buzzer around in front of some students. The buzzer is emitting a sound. What will the students at points A and B hear?
At A, a sound of higher frequency. At B, a sound of lower frequency.
No difference in frequency
At A, a sound of lower frequency. At B, a sound of higher frequency.
Which of these galaxies is furthest away from Earth?
Galaxy 1
Galaxy 2
Galaxy 3
Red shift
The expanding Universe
The Big Bang
What does Hubble’s graph show?
It shows that the speed of galaxies is inversely proportional to distance from Earth
It proves the Big Bang Theory
It implies that all the galaxies started at a single point
What does Cosmic Microwave Background Radiation (CMBR) do?
It shows that the Universe is expanding
It gives a snapshot of the Big Bang and the radiation it emitted at the time