knight ch20

8/9/2019 Knight Ch20

1/22

Chapter 20


2/22

The graph at the top is the history graph atx= 4 m of awave traveling to the right at a speed of 2 m/s. Which is

the history graph of this wave atx= 0 m?

(! (2! ("! (4!


3/22

The graph at the top is the history graph atx= 4 m of awave traveling to the right at a speed of 2 m/s. Which is

the history graph of this wave atx= 0 m?

("! (4! (! (2!


4/22

Which of the following actions wo#ld ma$e a p#lse travel

faster down a stretched string?

. %ove yo#r hand #p and down more ic$ly as yo#

generate the p#lse.

2. %ove yo#r hand #p and down a larger distance asyo# generate the p#lse.

". 'se a heavier string of the same length #nder the

same tension.

4. 'se a lighter string of the same length #nder thesame tension.

). 'se a longer string of the same thic$ness density

and tension.


5/22

Which of the following actions wo#ld ma$e a p#lse travel

faster down a stretched string?

. %ove yo#r hand #p and down more ic$ly as yo#

generate the p#lse.

2. %ove yo#r hand #p and down a larger distance asyo# generate the p#lse.

". 'se a heavier string of the same length #nder the

same tension.

4. Use a lighter string of the same length, under thesame tension.

). 'se a longer string of the same thic$ness density

and tension.


6/22

What is the freency of this

traveling wave?

. 0 *+

2. ) *+

". 2 *+

4. 0.2 *+

). 0. *+


7/22

What is the freency of this

traveling wave?

. 0 *+

2. 5 Hz

". 2 *+

4. 0.2 *+

). 0. *+


8/22

What is the phase difference ,etween the crest of awave and the ad-acent tro#gh?

. 0

2. /4

". /2

4. " /2

).


9/22

What is the phase difference ,etween the crest of awave and the ad-acent tro#gh?

. 0

2. /4

". /2

4. " /2

5.


10/22

light wave travels thro#gh three transparent materials of

eal thic$ness. an$ is order from the largest to smallest

the indices of refraction n n2 and n".

. n2 n n"

2. n" n n2

". n n2 n"

4. n" n2 n

). n= n2= n"


11/22

light wave travels thro#gh three transparent materials of

eal thic$ness. an$ is order from the largest to smallest

the indices of refraction n n2 and n".

. n2 n n"

2. n3> n1> n2

". n n2 n"

4. n" n2 n

). n= n2= n"


12/22

my and 1ac$ are ,oth listening to the so#rce of so#nd

waves that is moving to the right. Compare the

freencies each hears.

. fmyf1ac$

2. fmy=f1ac$

". fmyf1ac$


13/22

1. fAmy< fZa!

2. fmy=f1ac$

". fmyf1ac$

my and 1ac$ are ,oth listening to the so#rce of so#nd

waves that is moving to the right. Compare the

freencies each hears.


14/22

Chapter 20eading 3#i+


15/22

graph showing wave displacement vers#s position at aspecific instant of time is called a

. snapshot graph.

2. history graph.

". ,ar graph.

4. line graph.). composite graph.


16/22

graph showing wave displacement vers#s position at aspecific instant of time is called a

1. sna"shot gra"h.

2. history graph.

". ,ar graph.



17/22

graph showing wave displacement vers#s time at aspecific point in space is called a

. snapshot graph.

2. history graph.

". ,ar graph.



18/22

graph showing wave displacement vers#s time at aspecific point in space is called a

. snapshot graph.

2. history gra"h.

". ,ar graph.



19/22

wave front diagramshows

. the wavelengths of a wave.

2. the crests of a wave.

". how the wave loo$s as it moves toward

yo#.

4. the forces acting on a string thats #nder

tension.

). Wave front diagrams were not disc#ssed inthis chapter.


20/22

wave front diagramshows

. the wavelengths of a wave.

2. the rests of a #a$e.

". how the wave loo$s as it moves toward

yo#.

4. the forces acting on a string thats #nder

tension.

). Wave front diagrams were not disc#ssed inthis chapter.


21/22

The waves analy+ed in this chapter are

. so#nd waves.2. light waves.

". string waves.

4. water waves.

). all of the a,ove.


22/22

The waves analy+ed in this chapter are

. so#nd waves.2. light waves.

". string waves.

4. water waves.

5. all of the a%o$e.

knight ch20

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