waves Flashcards
how to measure a ray angle
between ray and normal
what is the law of reflection
angle of incidence is always equal to angle of reflection
when does light bend toward normal
when entering a material with higher RI
when does light bend away from normal
when entering a material with a lower RI
what are the conditions needed for TIR
critical angle < angle of incidence
longitudinal waves…
oscillate parallel to the direction of travel
transverse waves…
oscillate perpendicular to the direction of travel
examples of transverse waves
ocean surface, EM waves, seismic S waves
examples of longitudinal waves
sound, seismic P waves
order of EM spectrum
radio, microwave, infrared, visible, ultraviolet, x-ray, gamma ray
uses of radio waves
communication, radio telescope
uses of microwaves
cooking, satellite transmissions
hazard of microwaves
internal heating
uses of infrared
heating, night vision
hazard of infrared
skin burns
