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VCE Physics Question Thread!

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james.358:
Nah. The only difference using a split ring would be to rectify the emf graph. So rather than sin(x) for example, the graph would look like |sin(x)|. Other than that, every other feature should be identical (e.g. maximum emf, frequency, flux).

TnGn74:
Do we need to know about relativity of simultaneity explicitly for VCE Physics?

nillyadis:
Is the frequency in a compression different to one in a rarefaction?

nillyadis:
How does polarisation support the theory that light is a transverse wave and not longitudinal?
Is is because:
it uses a vertical filter
the vertical filter stops every transverse wave that doesn't oscillate vertically and only allows a vertically oscillating wave to pass through
a longitudinal wave oscillates parallel to the direction the wave propagates
it is not longitudinal because we do not observe all waves passing through the filter,   

Bri MT:

--- Quote from: nillyadis on June 20, 2022, 09:20:05 pm ---How does polarisation support the theory that light is a transverse wave and not longitudinal?
Is is because:
it uses a vertical filter
the vertical filter stops every transverse wave that doesn't oscillate vertically and only allows a vertically oscillating wave to pass through
a longitudinal wave oscillates parallel to the direction the wave propagates
it is not longitudinal because we do not observe all waves passing through the filter,   

--- End quote ---

Polarisation selects a particular direction (not necessarily vertical) of oscillation. Evidence for this is indicated by light being able to pass through one polarisation filter, but not a second one that selects for the perpendicular direction of oscillation. In longitudinal waves, oscillation is parallel to the direction of wave movement whereas in transverse waves particles oscillate perpendicular to the direction the wave is moving in. Thus, only transverse waves undergo polarisation, and light being able to be polarised suggests that it is a transverse wave.

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