Reflection, Transmission and Absorption
Which will transmit more light? A beaker full of water or a beaker full of diet coke?
Water
What are the tallest parts or "peaks" of a wave called?
Crests
Which electromagnetic wavelength do we rely on for cooking and wifi?
Microwaves
True or False: Sound travels at the same speed as light
False. Sound travels far slower than light. Approx. 767 mph compared to light speed 670,616,629 mph
What 3 kinds of cone cells do we have?
Red, Green and Blue
What is it called when light is bent, like light shining through a prism?
Refraction
A wavelength can be measured by calculating the distance between the peaks of the waves OR....
The troughs (Low points)
Which color on the visible light spectrum has the longest wavelength?
Red
If sound could travel through space, the ___________ would be quite noisy.
Sun
Light travels in waves, but those waves move in a ____________ line.
Straight
What is the difference between transparent and translucent?
Transparent objects are completely see-through and allow all or almost all light to pass through. Translucent objects are sometimes see-through but will only allow some light to pass through them.
The distance between the center line of a wave to the crest is called the ______________.
Amplitude
What are the two types of invisible light closest in wavelength to the visible light spectrum?
Infrared and Ultraviolet
What is the name of a reflection of sound?
Echo
If the clear path of light is blocked by an object before it reaches the surface it is shining on, what will happen?
A shadow will form
When we look at a banana, we see the color yellow because ____________is being reflected and ____________ is being absorbed
The yellow wavelength; every other color
What is frequency?
The number of waves in a given space
Name one use for both infrared and ultraviolet
IR: Greenhouses, heat lamps, night vision cameras, remote controls, wireless video games
UV: Tanning, identifying certain animals in the dark, cleaning of food or surgical equipment, decoration, and production of vitamin d
Increasing the amplitude on a sound wave will cause the sound to be _____________.
Louder
Why is a shadow larger when the object casting the shadow is closer to the light source?
Because the closer the object is to the light, the more of the light source is blocked.
What are the two types of reflection, and what is the difference?
Regular and Scattered (diffuse). Regular reflection occurs when light bounces off an object at the same angle it bounced in at. This occurs on a smooth, polished surface. Scattered reflection occurs when light strikes a rough or unpolished surface and bounces off at different angles.
What is the name of the center line halfway between the peak and the valley called?
Baseline
The higher a wave's ______________, the more energy it has
Frequency
Describe how sound waves travel through matter
Sound waves are vibrations that require matter to travel. As the vibration moves through matter, the particles in the medium scrunch together (compress) and move apart (expand), which we modeled with the slinkies.
What are the four conditions of sight?
Light, eyes, clear path and an object