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Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

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raamish

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quote="applepie1996, post: 301250, member: 29508"]ok for diffraction of transverse waves
use a laser screen and a slit and pass the laser through the slits as the light passes through the slit it is diffracted so it spreads out onto the screen showing diffraction of transverse waves
for diffraction of longitudinal waves instead of using a screen and a laser use a c.r.o to detect the sound wave and a loudspeaker as a source of longitudinal wave[/quote]

what is polarizing of a wave?
And why does sound waves being longitudinal are shown as transverse waves?
 
applepie1996

applepie1996

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raamish said:
quote="applepie1996, post: 301250, member: 29508"]ok for diffraction of transverse waves
use a laser screen and a slit and pass the laser through the slits as the light passes through the slit it is diffracted so it spreads out onto the screen showing diffraction of transverse waves
for diffraction of longitudinal waves instead of using a screen and a laser use a c.r.o to detect the sound wave and a loudspeaker as a source of longitudinal wave
Click to expand...

what is polarizing of a wave?
And why does sound waves being longitudinal are shown as transverse waves?[/quote]
Without visuals, it can be hard to explain, but I will try.

There are different types of waves, and they travel in different ways. You mentioned transverse waves, which are the sort of waves that you see in water ripples or in beams of light. These waves oscillate back and forth along one plane, while they propagate (or travel) along a different one.

Think about ripples on water. The ripples move across the surface away from a disturbance, perhaps toward shore. However, the water molecules themselves are actually only moving up and down (the tall and shallow parts of the ripples that give them their appearance), and not getting any closer to shore. A good way to visualize the movement of this sort of wave is the idea of whipping a garden hose up and down. The ripples travel down the length of the hose, but the hose doesn't really go anywhere. This is a transverse wave.

The reason this sort of wave can be polarized is because you can whip the garden hose in any number of directions and create waves in all different orientations. Think about this, you can swing it up and down, or back and forth, or at any angle in between. The hose will always create a wave, but the waves will be "angled" differently from one another. Polarizing such a wave doesn't mean anything fancier than lining up all the waves so that they are angled the same way.

In other words, removing all of the sideways waves and keeping only the ones that stand up straight.
 
Silent Hunter

Silent Hunter

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applepie1996 said:
momentum = m x v
=6 x 10^-3 x [–4.6 – 7.5]=0.73Ns
it aprroaches with 7.5 m/s and leaves with 4.6 in oder direction so negative
Click to expand...

one thing: when the change in momemtum comes negative.... this means that its in the opposite direction? right? :)
 
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zainabk

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Hey.Can you tell me how to solve the last part of the last question of O/N2011's 23 paper :/
 
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zainabk

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Hey.Can you tell me how to solve the last part of the last question of O/N2011's 23 paper :/
 
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