waves, light, and optics Flashcards Preview

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Flashcards in waves, light, and optics Deck (31)
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1

period T

time for 1 wave to pass by

2

frequency, f

waves per seconds

3

high and low of wave

trough and crest

4

amplitude

distance above or below the equilibrium line

5

simple harmonic motion

any periodic motion that is the result of restoring force that is proportional to the displacement (back and forth motion over same path)

6

transverse wave

particles vibrate perpendicularly to direction of wave motion (like a "wave" at a stadium) (everything but sound pretty much)

7

longitudinal wave

particles vibrate parallel to the direction of wave motion (sound)

8

speed of mechanical wave

constant for any given medium - changes in different mediums - frequency and wavelength of 2 sounds can be different but their speed in the same medium will be same

9

how do waves transfer energy?

transfer motion of matter rather than matter itself - depends on wave's amplitude - if A doubles, energy quadruples

10

constructive interference

interference in which individual displacements on the same side of the equilibrium position are added together to forme the resultant wave

11

destructive interference

individual displacements on opposite side of equilibrium, cancels wave

12

range of human hearing

20 Hz - 20,000 Hz

13

at a free boundary

reflected pulses are identical to incident pulse

14

at fixed boundary

waves are reflected but inverted

15

Doppler effect

frequency shift that is the result of relative motion between the source of the waves and the observer

16

beats

pulsation in loudness when two tones of nearly the same frequency are sounded simultaneously

17

light

electromagnetic radiation, compound of several toms of radiation

18

spectrum progression

low f and long wavelength at radio end, high f and short wavelength at gamma end

19

incident and reflected angles?

equal

20

diffuse reflection

light reflected from a rough, textured surface such as a road surface is reflected in many differ directions

21

specular reflection

light reflected from a shiny, smooth surface is reflected in only one direction

22

refraction

bending of light as it travels at an angle from one medium to another because it speeds up or slows down

23

green + red

yellow

24

red + blue

magenta

25

green + blue

cyan

26

complementary colors

add up to white

27

cyan + red

white

28

yellow + red

white

29

magenta + green

white

30

flat mirrors

rays appear to come from behind the mirror's surface (object distance = image distance), virtual image

31

virtual image

image formed by light rays that only appear to intersect