What is Light?
Light is a kind of wave that can travel through space.
What is an electromagnetic wave?
The highest point of a wave is called this.
What is the crest?
These are the only electromagnetic waves we can see.
What is visible light?
A material that you can see through clearly, like clean glass, is called this.
What is transparent?
These three colors of light can combine to make many other colors: red, green, and ____.
What is blue?
Light travels fastest in this: space, air, water, or glass?
What is space (a vacuum)?
The lowest point of a wave is called this.
What is the trough?
These waves have longer wavelengths than visible light and feel like heat.
What are infrared waves?
A material that lets some light through but looks blurry, like wax paper, is called this.
What is translucent?
An object looks green because it does this with green light.
What is reflects green light?
his is how fast light travels in a vacuum (you can round).
What is about 300,000 km/s or 3.0 × 10⁸ m/s?
This is the height of a wave from the middle line to the crest.
What is amplitude?
These waves have shorter wavelengths than visible light and can cause sunburn.
What are ultraviolet (UV) waves?
A material that light cannot pass through at all, like wood, is called this.
What is opaque?
When white light passes through a prism, it splits into colors called this.
What is the spectrum or a rainbow?
This word means how often a wave passes a point each second.
What is frequency?
Higher amplitude light waves look brighter or dimmer?
What is brighter?
These waves are used to check for broken bones.
What are X‑rays?
This happens when light bounces off a surface.
What is reflection?
These cells in your eye help you see colors in bright light.
What are cones?
This is the distance from one crest of a wave to the next crest.
What is wavelength?
If a light wave’s frequency increases, what happens to its wavelength?
What is it gets shorter?
These are the highest-energy waves in the electromagnetic spectrum.
What are gamma rays?
This happens when light bends as it moves from air into water.
What is refraction?
These cells in your eye help you see in dim light, but not color.
What are rods?