Keywords Geocentric heliocentric telescope refraction reflection convex image

Keywords: Geocentric, heliocentric, telescope, refraction, reflection, convex, image P 1 Topic 1: Visible light and the solar system This topic looks at: Match up the following key words: Key word Telescope • Models of the Universe • Use of reflecting and refracting telescopes Geocentric • Describe what waves are and to calculate wave speed using distance, time wavelength and frequency Write the names of the planets in our Solar System in the correct order. Heliocentric What is the difference between a refracting telescope and a reflecting telescope? Use the following words – lenses (objective and eyepiece), mirrors, curved primary mirror. Italian scientist who invented the refracting telescope Sun centred model Ptolemy A device for producing a magnified image of distant objects Write a definition for the following words: Refraction Frequency: The distance from a convex lens to the point where the image of a very distant object is produced Galileo Copernicus Waves definition A telescope consisting of a series of lenses The point where converging light rays meet Earth centred model Write down 4 disadvantages of using a reflecting telescope 1. 2. 3. 4. Describe the models of the Solar System, including the names of the main scientists involved, and include a diagram for each: 1. Geocentric: Wavelength: Amplitude: 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 Use the equations to calculate the following: Wave speed(m/s) = distance (m) wave speed = frequency(Hz)x wavelength(m) time(s) 1. Calculate the speed of light waves that travel 900, 000 m in 3 seconds. 2. What is the speed of sound waves which have a wavelength of 2 m and a frequency of 170 Hz? 3. Calculate the wavelength of a wave that travel at 500 m/s and have a frequency of 100 Hz. 4. If a wave carries a surfer 52 metres in 8 seconds what is the wave speed? Focal length Refracting telescope 5. If some waves of 13 m wavelength have a frequency of 0. 5 Hz what is the wave speed? Keywords: focal point, waves, frequency, wavelength, amplitude, equation Came up with the geocentric model Came up with the heliocentric model, but did not have the evidence to prove it 2. heliocentric: