Waves

Question 1

Electric field oscillates in what plane

Answer 1

Horizontal (x - z ) plane

Question 2

Magnetic field oscillates in which plane

Answer 2

Vertical (x-y) plane

Question 3

Polarised light is what

Answer 3

Light that operates in only one plane

Question 4

Unpolarised light

Answer 4

Light waves are at random angles to each other

Question 5

What type of waves can be polarised

Answer 5

Only TRANSVERSE waves can be polarised

Question 6

What polarisation can pass through the polariser

Answer 6

Polarisation that is perpendicular to the lines/bars that make up the polariser.
Lines/bars makes object reflective in that plane, so transmission only occurs when at right angles.

Question 7

Malus’ Law

Answer 7

Gives an explanation for angles other than 0 and 90.
Unpolarised passed through polariser, then passed through analyser. Transmission axis ( axis that allows light to pass through the Polaroid) analyser is rotated through an angle when compared to the polariser.

Question 8

Malus law inverse square

Answer 8

Intensity of the beam is proportional to the square of the amplitude.