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:
Draw a diagram to show the frequency, wavelength and amplitude of a wave.
Keywords: focal point, waves, frequency, wavelength, amplitude, equation

2. Use the equations to calculate the following:
Wave Equation
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?
Describe the difference between a virtual image and a real image
Describe the difference between a virtual image and a real image
Lenses
Draw a diagram for an image through a converging lens.
What is the focal length?
Describe how you would create an image using a converging lens. 1. 2. 3.
Refraction and reflection. When light hits a boundary between one medium and another it can be refracted or reflected
Refraction: Complete the diagram to show the incoming and outgoing rays.
What changes take place when light travels through different densities of material like a glass block ?
In which direction does the light travel as it enters a more dense material
Describe how the distance of an object from the lens effects the Image.
Object distance
real or virtual
right way up or upside down
Size of image
Distance of image 2F
real
Upside down
Same size
Between 2F and F
Less than F
Reflection: The angle of incidence is equal to the angle of ___________________