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← Topic 7 overviewTOPIC 7 ASSESSMENT

Waves

CIE-style questions assess wave types, phase, graphs, intensity, electromagnetic waves and polarisation.

Objective question 1

In a longitudinal wave, oscillations are:

Objective question 2

Points separated by λ/2 have phase difference:

Objective question 3

A displacement–distance graph gives:

Objective question 4

If amplitude doubles, intensity becomes:

Objective question 5

Polarisation is possible only for:

Structured question 1

A wave has frequency 400 Hz and wavelength 0.85 m. Calculate its speed.

Structured question 2

A source emits 100 W isotropically. Calculate intensity at 2.0 m using I = P/(4πr²).

Structured question 3

Calculate the frequency of electromagnetic radiation with wavelength 500 nm. Use c = 3.00 × 10⁸ m s⁻¹.