Visible Light And The Solar System (P1.1) Flashcards
What is the heliocentric model?
The current model of the solar system with the sun in the centre.
What did Galileo see that supported the heliocentric model?
The four moons that orbited Jupiter.
What is refraction?
When light changes direction.
What is the focal length?
The distance between the focus and the lens.
In a refracting telescope, what does the eyepiece lens do?
Magnifies the image.
What is a transverse wave?
Waves that move at right angles to the direction of movement of the energy.
Three examples of electromagnetic waves.
Light, radio waves and microwaves.
What is a longitudinal wave?
A wave where the particles move back and forth in line with the direction that the wave is going.
What type of wave is a sound wave?
A longitudinal wave.
What is a seismic wave?
Waves produced by an explosion or earthquake which travel through the earth.
What is wave frequency?
The number of waves passing a point every second.
What is wavelength?
The distance from a point on one wave to the same point on the next wave.
What is amplitude?
The maximum distance of a point on the wave from its rest position.
What is wave speed?
How fast the energy in a wave travels.
What was the geocentric model?
A model of the solar system with the earth in the centre.
