Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
WARRIOR:
--- Quote from: Shooting Star on May 25, 2010, 08:17:43 pm ---need help with m/j 2006 q21
i always get confused with such stuff. ive seen it in many past papers. how do you know if the waves will refract or not and whether the wavelength will vary???
--- End quote ---
first of all FREQUENCY NEVER CHANGES.
speed adn wavelength only changes whn somethin gets refracted
the speed slows down and wavelength decreases if ur goin to a deneser medium and the opposite happens if ur goin to a less dese medium
REMEMBER DEEP WATER : FAST SHALLOW WATER = SLOW
in this case answer is defntly B
and the wave move straing caz angle of incidence is along the normal..pretend the reflractive surface is a miror
Ivo:
--- Quote from: Kimo Jesus on May 25, 2010, 08:21:53 pm ---first of all FREQUENCY NEVER CHANGES.
speed adn wavelength only changes whn somethin gets refracted
the speed slows down and wavelength decreases if ur goin to a deneser medium and the opposite happens if ur goin to a less dese medium
REMEMBER DEEP WATER : FAST SHALLOW WATER = SLOW
in this case answer is defntly B
and the wave move straing caz angle of incidence is along the normal..pretend the reflractive surface is a miror
--- End quote ---
An explanation to why frequency is the same: do colour of the waves change when going from deep to shallow water and back? Think!
The Golden Girl =D:
--- Quote from: A@di on May 25, 2010, 08:20:36 pm ---
B - sound wave longitudinal wave..Longitudinal waves are waves that have the same direction of vibration along their direction of travel
--- End quote ---
still didn't get it :-[ ???
Ivo:
Guys, this is really confusing for me: describe and explain the function of a 'split ring' commutator in an electric motor.
Ivo:
--- Quote from: the golden girl on May 25, 2010, 08:25:03 pm ---still didn't get it :-[ ???
--- End quote ---
The vibrations of particles are to and fro are parallel to wave direction. The vibrations of particles are up and down perpendicular to wave direction. Get it?
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