Visable Light And Solar System Flashcards
What is the geocentric model
Everything orbited the early in perfect circles
What is the heliocentric model
Sun at the middle of the solar system
What is wavelength
Peak to peak
What is frequency
How many waves per second in Hz
What are the formulas for wave speed
Speed = frequency x wavelength(m)
Speed =distance / time
What is a transverse wave and examples
Vibrations at 90 degrees to direction of travel
Light waves
What is a longitudinal wave and give examples
Vibrations are along the same direction as the wave
Sound and ultrasound
Why is light reflected
Change in density
What is a real image
Where light from an object comes together to form an image on a screen
What is a virtual image
Rays are diverging so the light from an object appears to be coming from a different place
What is a converging lens
Focuses light by bending waves closer together
What is focal length
Distance from lens to focal point
What is a refracting telescope
Made up of objective and eyepiece lens.
The rays enter almost parallel and the objective lens forms a real image at the focal point.
The light from the real image then enters the eyepiece lens and is spread out
What is a reflecting telescope
Large concave mirror collects rays if light and reflects it into a smaller mirror which reflects it to an eyepiece
