What is Light
EM Spectrum
Interactions of Light Waves
Interactions of Light Waves II
Light and Color
100
This is the only electromagnetic wave that can be seen.
What is visible light.
100
This electromagnetic wave has the least amount of energy.
radio
100
In this interaction of light waves light bounces off of objects.
What is reflection.
100
Water waves bend as they travel past a jeddy.
diffraction
100
Light passes through this type of matter clearly.
a) translucent
b) transparent
c) opaque
d) diffused
e) absorptive
b) What is transparent matter.
200
An electromagnetic wave consists of these two fields.
What are electric and magnetic fields.
200
These electromagnetic wave has the shortest wavelength and highest energy.
gamma waves
200
In this interaction of a light wave light bends as it moves from one substance to another (as from air to glass), causing rainbows and optical illusions such as a pencil in a glass of water.
What is refraction.
200
We see ourselves in mirrors because of ___________.
a) refraction
b) diffraction
c) reflection
d) transmittance
c) reflection
200
Some light transmits through __________ or _________ matter, but no light can transmit through __________ matter.
What is transparent or translucent but ... opaque.
300
How long does it take light to reach us from the closest star (Alpha Centauri)?
4.3 years
300
This electromagnetic wave gives us sun burn.
ultraviolet rays
300
We can not see our reflection on rough objects because the light doesn't reflect at one angle. Instead the light _____________.
What is scatters. (diffuse is OK also.)
300
Why does a pencil look bent in water?
refraction
300
In a strawberry this wavelength is reflected.
What is red.
400
Visible light takes this amount of time to reach the Earth.
What is 8.3 minutes.
400
These types of electromagnetic rays are slightly dangerous. These waves produce heat.
What are infrared waves.
400
When a wave bends around corners/edges.
What is diffraction?
400
How can we see an image with a reflecting telescope? (You must give explicit details.)
There is a small mirror set at 45o which reflects the image from the objective lens so that it lands at the focal length of the eyepiece which magnifies the image and focuses it on the retina of our eye.
400
For the shade of black: red, orange, yellow, green, blue and violet is ____________.
What is absorbed.
500
Who first described the relationship between electricity and magnetism? (Hint: A devote Christian.)
a) Aristotle
b) Sir Humphrey Davies
c) Isaac Newton
d) Michael Faraday
e) James Clerk Maxwell
f) Albert Einstein
g) Mr. Richardson
h) Mr. Simmons
d) Who is Michael Faraday?
Aristotle, Davies, Newton and Albert Einstein were NOT Chrstians. Maxwell was also a Christian.
500
Ultraviolet rays gives us this one good side effect.
What is Vitamin D.
500
____________ objects allow light to shine through them clearly.
a) translucent
b) transparent
c) opaque
d) diffuse
c) What is opaque? Diffuse is a description of how non-smooth objects reflect light.
500
Light refracts as it passes through our atmosphere. This wavelength is the first to scatter because it has the most energy and the shortest energy.
and
Why does the sun look more reddish as it sets?
What is the blue-violet end of the spectrum of visible light.
and
Because the rays from the sun travel through more atmosphere and hence more blue-violet light is scattered.
500
What happens to the wavelengths of light when we see a blue tranlucent object?
All colors are absorbed except blue, which is transmitted.