Science: Unit 2 Flashcards
(23 cards)
refraction
the bending of light or sound as it passes through something like a wall (sound) or a window (light).
reflection
the return of light or sound waves from a surface.
lens
a curved piece of glass or plastic used singly or combined in an instrument (such as a microscope) for forming an image by focusing rays of light.
Electric magnetic spectrum
A type of wave that transfers energy.The range of waves that includes radio waves, microwaves, infrared waves, visible light, ultraviolet light, X-rays, and gamma rays.
Crest
The highest point, or peak, of a transverse wave
trough
The lowest part of a wave.
wavelength
the distance from one crest to another, or from one trough to another, of a wave
frequency
How many wavelengths can pass in a certain amount of time
Does a mirror flip in x, y, or z
z
Who discovered Uranis?
William Herschel and his sister Caroline
Which lens do you use in a telescope? Converging Convex or diverging concave
converging convex
Draw a reflecting telescope diagram
See paper
Draw a refracting telecsope
See paper
Name the 2 types of optical telescopes
reflecting and refracting
How many types of electromagnetic radiation are there?
7 (Gamma Ray, X Ray, Ultraviolet, Visible, Infrared, Microwave, Radio)
If the wave length is shorter is it higher pitched or lower pitched?
higher pitched
If the wave length is longer is it higher pitched or lower pitched?
lower pitched
Name the wavelengths from shortest to longest
Gamma Ray, X Ray, Ultraviolet, Visible, Infrared, Microwave, Radio)
When was the first telescope made?
1608
What is the main difference between a refracting telescope and a reflecting telescope?
A refracting telescope uses lenses to bend the light. A reflecting telescope uses mirrors.
What limits the size of a refracting telescope?
The objective lens limits the size
Why do radio telescopes have to be larger than optical telescopes?
Radio telescopes collect radio waves which are much longer than visible wavelengths
Why do astronomers place telescopes in space?
