7.3,7.4 Polarisation, Doppler Effect

Polarisation is only in __ waves & plane polarised is when o__ are l__ to _ p__

transverse, oscillations, limited, 1 plane

Light can be polarised w/ a p__ filter (Polaroid)
> only o__ in 1 d__ (plane) can p__
> r__ l__ is p__ polarised, so polarised glasses can reduce g__
> a 2nd Polaroid (an a__) that is p__ to the 1st will b__ the light

polarising, oscillations, direction, polarised, reflected light, partially, glare, analyser, perpendicular, block

analyser

Malus’ Law
> If the a__ is r__ & NOT p__, intensity = I = __ (where I_o is intensity before reaching ts)

analyser, rotated, perpendicular, Iocos^2

When u__ light passes thru a Polaroid, __ the intensity will pass to make p__ light (won’t happen again after)
> not in Malus’ Law as light is alr p__ before reaching the a__

unpolarised, half, polarised, polarised, analyser

Doppler Effect
> if the source moves t__ you, wavelength is __ so observed freq (pitch) is __
> thus f_o = f_s(v/v _ v_s)

towards, decr, incr, -

Doppler Effect
> if the source moves a__ from you, wavelength is __ so observed freq (pitch) is __
> thus f_o = f_s(v/v _ v_s)

away, incr, decr, +

f_o =

fs(v/v+-vs)