Color
EMS
Prism Party!
Reflection
Wave It Off!
What's the Matter?
Light Bright
100
This is the acronym used to remember the colors of the visible spectrum.
What is ROY G. BIV?
100
Which type of EM wave has the longest wavelength?
What are radio waves?
100
What does a prism do to white light?
(other than refract it)
Disperses it, or separates it into the colors of the spectrum
100
What do we call the incoming light ray that strikes a surface?
Incident Ray
100
Light travels in what kind of wave?
What is a transverse wave?
100
This word describes a material that lets all light pass through so you can see clearly
What is transparent?
100
The brightness of a light bulb is now typically given in these units
Lumens
200
The three colors the cone cells of our retina respond to
Blue, red, green
200
The part of the electromagnetic spectrum that this guy can see and we can't
What are ultraviolet (UV) rays?
200
What is it called when light bends as it enters a new medium?
What is refraction?
200
If the angle of incidence is 55o, what is the angle of reflection?
55o
200
Light that is vibrating all in one plane is said to be __________
Polarized
200
This word describes a frosted glass shower door that lets some light through but scatters it.
What is translucent?
200
Another unit for brightness (or luminous flux) besides lumens is ______________
candelas
300
This color has the most energy and the shortest wavelength.
What is violet?
300
Which EM waves can pass through the body and are used in hospitals to see bones?
What are X-rays?
300
Whose law helps predict a light beam's angle of refraction?
Snell's Law
300
This type of reflection is seen in a very smooth surface, such as a mirror (Hint: Begins with S)
What is specular reflection?
300
The distance from one crest to the next is called what?
What is wavelength?
300
A brick wall or other material that allows no light to pass through is said to be _____________.
What is opaque?
300
This is the unit for illuminance, and is equivalent to lumens/m2
Lux
400
What color results from mixing cyan paint and yellow paint?
Green
400
What is the frequency of an electromagnetic wave with a wavelength of 3.4 cm?
8.8 x 109 Hertz
400
An incident light ray enters water, from air, at an angle of 57o. What is the angle of refraction?
39o
400
Who used a rotating octagonal mirror to discover the speed of light?
Albert Michelson
400
For any wave, velocity equals this times wavelength
What is frequency?
400
The technology that allows communication around the world with beams of pulsating light.
Fiber Optics
400
A lightbulb on a tall lamp post is 24 m from the ground. If the lamp post is lowered to 8 m, how many times brighter is the illumination of the ground?
9 times brighter
500
What is the complementary color of red?
Cyan
500
Name the parts of the Electromagnetic Spetrum from longest wavelength to shortest wavelength.
radio, micro, infrared, visible, ultraviolet, Xrays, Gamma rays
500
A light ray in diamond hits the air interface at 30o.
What is the angle of refraction?
(n for diamond is 2.42)
There is none. It internally reflects.
500
What does LASER stand for?
Light Amplification by Stimulated Emission of Radiation
500
The fundamental particle and quantum of electromagnetic radiation, representing the smallest, discrete packet of light energy
Photon
500
When a material takes in light energy instead of bouncing or letting it through, this is happening.
What is absorption?
500
A 160 candela lightbulb is illuminating a piece of paper 3.5 meters away. What is the illumination of the paper?
13.1 lux