Light Waves
a range of wavelengths
spectrum
to give off
emit
a type of wave that carries energy from one place to another, even through empty space
light
What does light carry that causes materials to change?
energy
TRUE
a group of atoms joined together in a particular way
molecule
to take in
absorb
the ability to make things move or change
energy
True or False - The movement of energy can be tracked by observing the changes the energy causes in matter.
TRUE
a type of invisible light that is beyond violet on the spectrum
ultraviolet
anything that has mass and takes up space
matter
to bounce off without absorbing
reflect
the maximum height of a wave
amplitude
True or False: Light carries energy that does not cause materials to change.
False!
Light carries energy that DOES cause materials to change.
to form a mental picture of something that cannot be seen
visualize
What's the dark brown pigment occuring in the hair, skin, and iris of the eyes of humans and animals called?
melanin
to pass through
transmit
the distance from one peak of a wave to the next
wavelength
True or False: When a material absorbs energy from light, the energy causes the material to change.
TRUE!
True or False: When light is transmitted through or reflected off a material, the energy is not absorbed, so the material does not change.
TRUE!
When studying Australia and Brazil, we learned Australia has less WHAT in the atmosphere contributing to higher rates of skin cancer.
ozone
to change direction when it enters at an angle
refract
the number of peaks of a wave that pass in a second
frequency
False!
A light source can emit MORE THAN one type of light.
When a light hits a material... The light can do what 4 things we've learned about in class?
absorbed, transmitted, reflected, or refracted.