This relates the transmitted intensity I to the incident intensity I ∘ when polarised light is incident and then transmitted through an analyser. The relation is I = I ∘ cos 2 θ where θ is the angle between the transmission axis and the direction of the incident electric field.

Physics for the IB Diploma 6th Edition>Chapter 4 - Waves>Test yourself>Q 18

HARD

Diploma

IMPORTANT

Earn 100

Two waves are simultaneously generated on a string. The graph shows the variation of displacement $y$ with distance $x$ . Draw the actual shape of the string.

Important Questions on Waves

EASY

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 4 - Waves>Test yourself>Q 20

State what is meant by polarised light.

EASY

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 4 - Waves>Test yourself>Q 20

State two methods by which light can be polarised.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 4 - Waves>Test yourself>Q 21

Suggest why only transverse waves can be polarised.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 4 - Waves>Test yourself>Q 23

State Malus’s law.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 4 - Waves>Test yourself>Q 23

Polarised light is incident on a polariser whose transmission axis makes an angle of

25 °

with the direction of the electric field of the incident light. Calculate the fraction of the incident light intensity that is transmitted through the polariser.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 4 - Waves>Test yourself>Q 27

A ray of light is incident on a rectangular block of glass of refractive index $1.450$ at an angle of $40 °$ , as shown in the diagram. The thickness of the block is $4.00 cm$ . Calculate the amount $d$ by which the ray is deviated.

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