Electromagnetic Spectrum
If the frequency of a wave increases, what happens to the energy and wavelength?
Energy increases
Wavelength decrease
What is the main source of white light?
The Sun
What is it called when light goes from one medium to another and bends?
Refraction. (Remember, light always travels in a straight line.)
What travels faster, light or sound?
Light waves
Is a Peppergram the same as a hologram?
No, holograms start with a 3D image where peppergrams start with 4 2D images.
What electromagnetic energy has the lowest frequency?
Radio Waves
What are the 7 colors of white light?
ROYGBIV - Red, Orange, Yellow, Green, Blue, Indigo, Violet.
Why do light waves slow down when they hit water?
Water is more dense.
What do sound waves need to travel?
A medium
How does the angle of incident relate to the angle of reflection
They are equal
What electromagnetic energy has the highest frequency and therefore the most dangerous?
Gamma Rays
Does white light get absorbed or reflected off of a white surface?
Reflected
Name the main two parts of the eye and the nerve that are used for optical illusions, and the job of each of the 3 parts.
The pupil takes in the image, the retina transfers that image into electric signals and the optic nerve sends those signals to the brain to create a visual picture.
What is the difference between how a sound wave travels and a light wave travels (use one vocabulary word for each)
Sound waves are longitudinal waves and light waves are transverse waves
It is 90 degrees from the surface the image is being streamed onto.
What waves are right before visible red light waves?
Infrared waves.
How do we see the color of a solid object when white light hits it?
The color of the object is reflected, all the other colors are absorbed.
What is the process called to turn a glass into a one-way mirror?
Half-silvering
If the amplitude of a sound wave increases, what happens to the sound?
It increases in volume.
What type of material does the peppergram have to use?
Something transparent and reflective for the image to go through and also reflect back to your eyes. (plastic, glass)
What are the 7 electromagnetic radiations from lowest frequency to highest frequency?
Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma
What color has the lowest frequency wavelength?
Red
How could you make a glass act like a one-way mirror that is in a room as a divider by adjusting the lighting, if you are on the side that looks like a mirror?
Turn the light on for the side you are on, and the light off on the other side.
What are the low and high parts of a light wavelength called?
Low -> Trough
High -> Crest
What is the ray called between the normal and the surface that is caused by reflection?
Incident ray.