Reflection
What is the law of reflection?
The angle of incidence equals the angle of reflection.
What happens when light moves from air into water?
It slows down and bends toward the normal.
What happens when a wave passes through a narrow opening?
It spreads out or bends around the edges.
What type of electromagnetic wave allows us to see colors?
Visible Light
Which type of wave can travel through space, light or sound?
Light, because it does not need a medium.
What type of surface creates a clear reflection?
A smooth, shiny surface like glass or water.
Why does a straw look bent in a glass of water?
Light refracts as it moves from water to air.
What happens when sound waves pass through a doorway?
They spread out into the next room.
Which type of electromagnetic wave causes sunburns?
Ultraviolet (UV) light.
Which travels faster in air, light or sound?
Light, because sound needs particles to move.
What is the difference between regular and diffuse reflection?
Regular reflection happens on smooth surfaces; diffuse reflection happens on rough surfaces.
How does a prism create a rainbow?
It refracts light into different colors based on wavelength.
Why can you hear someone talking around a corner but not see them?
Why can you hear someone talking around a corner but not see them?
What type of electromagnetic wave is used in night vision goggles?
Infrared waves.
How does sonar use sound waves?
It uses sound reflection to detect objects underwater.
What is an example of an object that uses reflection to work?
A periscope, mirror, or camera.
Why do lenses in a microscope bend light?
To magnify objects by refracting light.
What happens to diffraction when a wave passes through a wider opening?
Less diffraction occurs, and the wave stays more straight.
What type of electromagnetic wave is used in microwaves to heat food?
Microwaves
Why does sound travel faster in water than in air?
Because water molecules are closer together than air molecules.
What is an incident ray?
A light ray that strikes a surface before being reflected.
What is total internal reflection, and where is it used?
When light is completely reflected inside a material; used in fiber optics.
What kind of waves show the most diffraction: long or short wavelengths?
Long wavelengths, such as radio waves.
What type of electromagnetic wave is used to see inside the body?
X-Rays.
Which travels faster in air, thunder or lightning?
Lightning, because light travels faster than sound.