Color
When all colors of the visible spectrum are mixed, they create _______________ light.
white
A material that allows all light to pass through clearly is described as:
Transparent
Which part of the EM spectrum is used by cellular phones for communication?
Radio Waves
The distance between two consecutive crests of a wave is the:
Wavelength
Light acts as a wave when it undergoes:
Reflection
Interference
Refraction
All of the above
All of the above
An object that absorbs all colors of light appears _______________.
black
Which of these is an illuminated object?
Burning Candle, Sun, Moon, Flashlight
Moon
Which wave type is used in medical imaging to see broken bones?
XRays
The number of wave cycles that pass a point per second is called _______________.
frequency
Which type of light source is the most energy-efficient for modern homes?
LED
Why can people see distinct colors?
Their eyes detect the difference in wavelengths of light
The edge of a shadow that is partially illuminated is known as what?
Penumbra
Excessive exposure to _______________ rays can lead to skin cancer.
UV radiation is primarily blocked by which layer of Earth's atmosphere?
Ozone Layer
The bending of a wave around a barrier or through an opening
Diffraction
Which of the following colors has the highest frequency?
Red, Green, Yellow, or Violet
Violet
Which artificial light source works by flooding gas molecules with electrons under low pressure?
Fluorescent
As the frequency of an electromagnetic wave increases, its energy:
Increases
Which EM waves are used by heat-seeking cameras?
Infrared
The "Photoelectric Effect" supports the theory that light is a:
Particle
Why do we see a "blue" shirt as blue?
It reflects blue light and absorbs others.
A transparent or translucent device that allows only certain wavelengths of light to pass through it.
Light Filter
What is the difference between a mechanical wave and an electromagnetic wave?
Mechanical needs a medium
Describe one way that Gamma rays are beneficial to humans and one way they are harmful.
Kills cancer cells, but can cause radiation sickness
The bending of a wave because of a change in the wave’s speed as it passes from one medium to another.
Refraction