Keywords: Geocentric, heliocentric, telescope, refraction, reflection,convex,image
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
Match up the following key words:
Key word
Telescope
Geocentric
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 900,000,000m in 3 seconds.
2.
What is the speed of sound waves which have a wavelength of 2m and a
frequency of 170Hz?
3. Calculate the wavelength of a wave that travel at 500m/s and have a
frequency of 100Hz.
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 13m wavelength have a frequency of 0.5Hz 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: