How can we help?

You can also find more resources in our Help Center.

47 terms

science test 10

STUDY
PLAY
electromagnetic waves
transverse waves that transfer electrical and magnetic energy
electromagnetic radiation
the energy transferred through space by electromagnetic waves
polarized light
light that vibrates in only one direction
photoelectric effect
the ejection of electrons from a substance when light is shined on it
photon
a tiny particle or packet of light energy
electromagnetic spectrum
the complete range of electromagnetic waves placed in order of increasing frequency
radio waves
electromagnetic waves with the longest wavelengths and lowest frequencies
microwaves
radio waves with the shortest wavelengths and the highest frequencies
radar
a system that uses reflected radio waves to detect objects and measure their distance and speed
infrared rays
electromagnetic waves with wavelengths shorter than radio waves, but longer than visible light
thermogram
an image that shows regions of different temperatures in different colors
visible light
electromagnetic waves that are visible to the human eye
ultraviolet rays
electromagnetic waves with wavelengths shorter than visible light, but longer than X-rays
X-rays
electromagnetic waves with wavelengths shorter than ultraviolet rays, but longer than gamma rays
gamma rays
electromagnetic waves with the shortest wavelengths and highest frequencies
transparent material
a material that transmits light without scattering it
translucent material
a material that scatters light as it passes through
opaque material
a material that reflects or absorbs all of the light that strikes it
primary colors
three colors that can be used to make any other color
secondary color
any color produced by combining equal amounts of any two primary colors
complementary colors
any two colors that combine to form white light or black pigment
pigment
a colored substance used to color other materials
ray
a straight line used to represent a light wave
regular reflection
reflection that occurs when parallel rays of light hit a smooth surface and all reflect at the same angle
diffuse reflection
reflection that occurs when parallel rays of light hit a rough surface and all reflect at different angles
plane mirror
a flat mirror that produces an upright, virtual image the same size as an object
image
a copy of an object formed by reflected or refracted rays of light
virtual image
an upright image formed where rays of light appear to meet or come from
concave mirror
a mirror with a surface that curves inward
optical axis
an imaginary line that divides a mirror in half
focal point
the point at which light rays parallel to the optical axis meet, or appear to meet, after being reflected (or refracted) by a mirror (or a lens)
real image
an upside-down image formed where rays of light meet
convex mirror
a mirror with a surface that curves outward
index of refraction
a measure of the amount a ray of light bends when it passes from one medium to another
mirage
an image of a distant object caused by refraction of light as it travels through air of varying temperature
lens
a curved piece of glass or other transparent material that is used to refract light
convex lens
a lens that is thicker in the center than at the edges
concave lens
a lens that is thinner in the center than at the edges
cornea
the transparent front surface of the eye
pupil
the opening in the center of the iris through which light enters the inside of the eye
iris
the ring of muscle that controls the size of the pupil and gives the eye its color
retina
the layer of cells that lines the inside of the eyeball
rods
cells in the retina that detect dim light
cones
cells in the retina that respond to and detect color
optic nerve
short, thick nerve that carries signals from the eye to the brain
nearsightedness
a condition that causes a person to see distant objects as blurry
farsightedness
a condition that causes a person to see nearby objects as blurry