OCR Physics A G482, Electrons, Waves and Photons, 25th May 2012

Its just a potential divider I believe

Cheers

And does anyone know what we need to know about semiconductors?

arent semiconductors transistors and diodes

Does anyone know a proper definition for refraction?

Does anyone know a proper definition for refraction?

Cheers

And does anyone know what we need to know about semiconductors?

Does anyone know a proper definition for refraction?

Refraction is when the speed of a wave changes due to a change in medium. This causes the direction to change.

Refraction occurs when a wave enters a medium in which it has a different speed.

Refraction is the change in direction of a wave due to a change in its speed.

aint seen it come up before though

Hi guys
how do you find the wavelength and frequency of :
-Closed/open at one end pipes
-Closed pipes

for the first 3 harmonics

Im not entirely sure of this but theres this equation: (stationary waves in closed pipes)

L=(2n+1)x(?/4) where ? = lambda(wavelength) x=multiply

You can rearrange to get lambda

and n = harmonic right?

How many significant figures? (I feel like I lost some marks in Mechanics because of this )

P.s Sweetascandy , my post last night about where the antinode on a stationary would be was when only a single loop is produced. When two loops are produced on a stationary wave then there will be 2 antinodes (each at where max-amplitude is found in each loop)

Definition of Superposition?