objects that reflect light are called:
non - luminous objects (cant produce their own light)
light can behave as either:
waves or particles
a prism can be used to disperse white light into what spectrum?
visible spectrum
X-rays, visible light, and radio waves are all parts of which spectrum?
electromagnetic spectrum
light can travel through____ because it requires no medium.
space
two methods that cause light to change direction are ____ and ____
refraction and reflection
when the angle of incidence reaches the _____ the angle of refraction is 90 degrees
critical angle
a lens that is thickest at the edges and skinniest in the middle is called
a concave lens
what application goes with this electromagnetic radiation: gamma rays
product of nuclear delay
what application goes with this electromagnetic radiation: infrared light
TV remote
what application goes with this electromagnetic radiation: radio waves
radar
what application goes with this electromagnetic radiation: UV rays
black light
what application goes with this electromagnetic radiation: visible light
human vision
what application goes with this electromagnetic radiation: x rays
dental imaging
describe ‘Normal’
the imaginary line perpendicular to the surface (eg on plane mirror)
describe ‘refraction’
the bending of light
describe ‘index of refraction’
a number that describes how optically dense a substance is
describe what ‘salt’ is
the characteristics that describes an image
describe ‘focal length’
the distance between f and o in a lens
describe ‘diverging’
light rays that spread apart from one another
describe ‘converging’
light rays that come together
for concave mirror, a ray travelling parallel to the principal axis will reflect
directly through the focal point
(hits lens, straight back down through F)
for concave mirror, a ray travelling through the center of curvature will
reflect straight back along the exact same path (straight back)
for concave mirror, a ray travelling through the focus will reflect
parallel to the principal axis (down through f, then straight left)
