For june 2011 question 11 I think it is (the one where you have to work out the resistance) for the last one I thought the total of the two resistors in series is 2R and then so 1/2R + 1/R = 3/2R but what's wrong, what am I doing wrong?
Therefore you can see that if blue and red light travel in the same media, other than vacuum, blue light will always have to experience a greater index of refraction.
Jan 11 q11c) - how are you supposed to know to where to mark the compressions on Z? I feel like I'm missing something really obvious but I just can't see it!
Jan 11 q11c) - how are you supposed to know to where to mark the compressions on Z? I feel like I'm missing something really obvious but I just can't see it!
One time period is between adjacent compressions. If the wave had traveled T the positions would basically look the same, the particles would have just moved up the line. However as 3/4T has passed then the compressions must be 3/4 along the line between two compressions.
If that does not make sense I will try to explain further.
One time period is between adjacent compressions. If the wave had traveled T the positions would basically look the same, the particles would have just moved up the line. However as 3/4T has passed then the compressions must be 3/4 along the line between two compressions.
If that does not make sense I will try to explain further.
Ah okay so if 1/2T had passed, the compressions would be halfway along the line between two compressions, i.e., at a rarefaction? Thanks!
No, The smaller the wavelength, hence greater the frequency the more the wave refracts. therefore if we take red and blue light, blue light will refract greater towards the normal than red light.
Diffraction is the opposite, the greater the wavelength the greater the diffraction.
How do you label something out of phase? I'm thinking of question 12 Jan 09
Do you mean out of phase or 180 degrees out of phase? out of phase can be anything that is not in phase with a point, wheres a point in anti phase must be 180 degrees out of phase.
Do you mean out of phase or 180 degrees out of phase? out of phase can be anything that is not in phase with a point, wheres a point in anti phase must be 180 degrees out of phase.