1. P1 Topic 1: Visible light and the solar system
Match up the following key words:
P1 Topic 1: Visible light and the solar system
This topic looks at:
Models of the Universe
Use of reflecting and refracting telescopes
Describe what waves are and to calculate wave speed using distance, time wavelength and frequency
Key word
definition
Telescope
A telescope consisting of a series of lenses
Geocentric
The distance from a convex lens to the point where the image of a very distant object is produced
Heliocentric
Italian scientist who invented the refracting telescope
Galileo
Sun centred model
Ptolemy
A device for producing a magnified image of distant objects
Copernicus
The point where converging light rays meet
Refraction
Earth centred model
Focal point
A lens which is thicker in the middle than it is at the edges
Converging lens
The change of speed and direction of a wave when it enters a new material
Focal length
Came up with the geocentric model
Refracting telescope
Came up with the heliocentric model, but did not have the evidence to prove it
Write down 4 disadvantages of using a reflecting telescope 1. 2. 3. 4.
Write the names of the planets in our Solar System in the correct order.
What is the difference between a refracting telescope and a reflecting telescope? Use the following words – lenses (objective and eyepiece), mirrors, curved primary mirror.
Describe the models of the Solar System, including the names of the main scientists involved, and include a diagram for each:
Geocentric:
heliocentric:
Keywords: Geocentric, heliocentric, telescope, refraction, reflection,convex,image
Waves
Write a definition for the following words:
Frequency:
Wavelength:
Amplitude:
Use the equations to calculate the following:
Wave speed(m/s) = distance (m) wave speed = frequency(Hz)x wavelength(m)
time(s)
Calculate the speed of light waves that travel 900,000,000m in 3 seconds.
What is the speed of sound waves which have a wavelength of 2m and a frequency of 170Hz?
Calculate the wavelength of a wave that travel at 500m/s and have a frequency of 100Hz.
If a wave carries a surfer 52 metres in 8 seconds what is the wave speed?
If some waves of 13m wavelength have a frequency of 0.5Hz what is the wave speed?
Keywords: focal point, waves, frequency, wavelength, amplitude, equation