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← Topic 8 overviewTOPIC 8 ASSESSMENT

Superposition

CIE-style questions assess interference, stationary waves, diffraction, double slits and gratings.

Objective question 1

The principle of superposition adds:

Objective question 2

Destructive interference of equal waves occurs for path difference:

Objective question 3

Adjacent stationary-wave nodes are separated by:

Objective question 4

Diffraction is most noticeable when aperture size is:

Objective question 5

A diffraction grating maximum obeys:

Structured question 1

A string 1.2 m long contains four equal stationary-wave loops. Calculate the wavelength.

Structured question 2

In a double-slit experiment λ = 500 nm, D = 2.0 m and slit separation a = 0.40 mm. Calculate fringe spacing.

Structured question 3

A grating has spacing 2.0 × 10⁻⁶ m. Calculate the first-order angle for λ = 500 nm.