visible light
The part of the electromagnetic spectrum that is visible to the human eye
6 types of rays on the electromagnetic spectrum that are invisible to the human eye:
gamma rays, X-rays, ultraviolet rays, infrared rays, radio waves, microwaves
These rays have the smallest wavelengths and the most energy of any wave in the electromagnetic spectrum, are produced by the hottest and most energetic objects in the universe, such as neutron stars and pulsars, supernova explosions, and regions around b
Gamma rays
A type of electromagnetic rays of high energy and short wavelength, which is able to pass through opaque materials. It is used to identify cracks or flaws in structural components such as bones and teeth
X-rays
This type of radiation can cause sunburn, skin cancer, eye cataracts, and wrinkles.
Ultraviolet rays
This type of light is associated with the heat given off by an object
infrared light
This form of electromagnetic energy is most commonly used in cooking by causing water and fat molecules in food to vibrate, thereby causing the food to heat up.
microwaves
These waves have the longest wavelengths and lowest frequencies in the electromagnetic spectrum. They are used for wireless transmission of sound messages for communication such as air traffic control, television, and cell phones
radio waves
prism
a cut piece of clear glass or plastic in the form of a triangle or other geometric shape.
spectrum
the band of color in a rainbow
3 properties of light
reflection, absorption, transmission
When light hits an opaque object:
light is scattered (reflected) and/or absorbed;
objects appear the color of light that they scatter (reflect) - all other colors are absorbed
When light hits a translucent object:
some colors are absorbed, and others pass through;
objects appear the color of the light that passes through them; object absorbs all other colors of light
When white light hits a _________________ surface is no light is reflected - it is all absorbed.
black
When white light hits a ___________________surface, all colors are reflected - nothing is absorbed.
white
What are the 3 primary colors of light?
red, blue, green
Yellow, magenta, and cyan are ________________________ colors of light.
secondary
Electromagnetism
The way in which electric and magnetic forces interact
__________________ is made of electric and magnetic waves that move through space - a form of electromagnetic radiation.
light
The one source that can produce all forms of electromagnetic radiation is the:
sun