Electromagnetic Spectrum
The electromagnetic spectrum is divided up based on what?
Wavelength
What is the name of the behavior when the wave hits an object and bounces back?
Reflection
When an object absorbs all the light, what color do you perceive?
Black
Why is the sky blue?
Blue wavelengths of light are dispersed by the particles in the atmosphere.
What is the Earth's Primary source of light energy?
The sun
What part of the electromagnetic spectrum can humans see?
Visible light which is made up of colors
If the angle of incidence in a reflection is 40 degrees, would the angle of reflection be more, less or equal to 40 degrees?
Equal to 40 degrees. The angle incidence matches the angle of reflection.
What determines the different colors in the electromagnetic spectrum?
What wave behavior is the reason contacts and glasses can correct vision?
Refraction - light bends so it focuses on the retina
What is the correct definition of amplitude?
The height of the wave
Which part of the electromagnetic spectrum has the longest wavelength?
a. infrared
b. Microwaves
c. Visible
d. X-rays
B - Microwaves
Light passing straight through an object.
Transmission
If blue and red light is being reflected, what color do you perceive?
Purple
Which electromagnetic spectrum wave is used to destroy cancer using radiosurgery?
Gamma Rays
The distance between two crests or two troughs are known as what?
Wavelength
What do scientists use to measure the distance between planets and stars?
Light years - the distance it takes for light to travel in one year.
When a wave enters a new medium and bends, what happens to the speed of that wave?
It slows down.
Why do you see the different colors? Example: Why do you see the blue of someone's shirt?
That is the color that is being reflected back to you. All other colors are being absorbed.
Why do you see the flash of light before you hear the thunder during a thunderstorm?
Light waves are known as a wave or a ______.
Particle because it is tiny bundles of energy that can move electrons.
List all parts of the electromagnetic spectrum. Place them in order of increasing energy. (Hint: there are 7)
Radio, Microwaves, infrared, Visible, UV, X-rays, Gamma
What would be a good definition of the wave behavior known as Refraction?
A wave bending and changing speed when it enters a different medium.
If you burn a magazine, and it gives off different color flames, what can you determine by that magazine page?
It contains different types of chemicals. Different chemicals burn at different colors.
Why is it better to wear white instead of black when it's sunny and hot outside?
Because white reflects all the light whereas black absorbs all the light making the person who is wearing the shirt harm.
electromagnetic waves (light) allow energy to travel due to vibrating ________ & _________ Fields.
Electric and Magnetic fields.