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15 Terms
light
a form of energy (3×10^8m/s)
reflection
the bouncing of light from a surface
1st law of reflection
the incident ray, the normal at the point of incidence and the reflected ray all lie on the same plane
2nd law of reflection
the angle of incidence = angle of reflection
parallax
th apparent motion of 2 objects due to movement of the observer
real image
formed by the actual intersection of rays, can be projected on a screen
virtual image
formed by the apparent intersection of rays
refraction
the bending of light as it passes through one medium to another
1st law of refraction
the incident ray, the normal on the point of incidence and the refracted ray all lie on the same plane
2nd law of refraction (snells law)
sini/sinr=n, n is a constant
electromagnetic waves
energy transmitted from one place to another at the speed of light
diffraction of waves
spreading out of a wave when it passes through a gap or obstacle
wave interference
when 2 waves meet and combine to form a new wave
monochomatic light
light of only one wavelength - lasers