How many The diffraction grating questions are there for 9702?

This page collects 6 recent Cambridge Physics (9702) past-paper questions tagged to The diffraction grating. Each links straight to instant marking against the official 9702 scheme.

How are The diffraction grating answers marked?

Type or photograph your working and MarkScheme scores it against the real 9702 mark scheme for this topic — method, accuracy and any band descriptors — so you see exactly where the marks are.

Where can I learn The diffraction grating first?

Start with the free Physics lesson on The diffraction grating, then come back and drill past-paper questions under timed conditions.

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9702 · topic questions

The diffraction grating

Physics6 questions

6 past-paper questions on The diffraction grating

9702/22 · May/June 20243 marks
The light has wavelength 520 nm. The separation of the lines in the grating is 3.8 × 10⁻⁶m. Determine the total number of bright…
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9702/23 · May/June 20253 marks
Calculate the number of lines per unit length in the diffraction grating.
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9702/23 · May/June 20242 marks
Use your answers in (b)(i) and (b)(ii) to calculate θ.
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9702/23 · May/June 20252 marks
Light of wavelength 720 nm in a vacuum is incident normally on a diffraction grating as shown in Fig. 6.1. A screen is parallel…
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9702/23 · May/June 20252 marks
The light in Fig. 6.1 is now replaced with light of a different wavelength λ. It is observed that the third-order maxima of this…
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9702/22 · May/June 20242 marks
State and explain the effect of this change on the number of bright fringes formed on the screen. A calculation is not required.
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Question stems are shortened previews. Open a question to attempt the full version and have it marked.

Worked example

What a lost mark actually looks like

This answer reaches the right coordinates and still drops a mark — the conclusion is stated, but never justified. Examiners pay for the reasoning, not the answer.

MARKED

80%

Strong

M1dy/dx = 3x^2 - 12x + 9M1 earned
M1(x - 1) $(x - 3) = 0$ M1 earned
A1 $x = 1$ or $x = 3$ A1 earned
B1(1, 5) is a maximum and (3, 1) is a minimumB1 not earned

B1 — withheld
You stated the nature of each point correctly, but stated it without justification. This mark needs the reasoning shown — either evaluate the second derivative (d²y/dx² = 6x − 12, giving −6 at $x = 1$ and +6 at $x = 3$ ) or show a sign change of dy/dx either side of each point. An unsupported assertion earns nothing here even when the conclusion is right.

The diffraction grating (9702) past-paper questions — marked instantly

These are real Cambridge Physics past-paper questions on The diffraction grating. Open one, attempt it, then upload your working — MarkScheme grades it against the official 9702 mark scheme so you see exactly where the marks are won and lost on this topic.

Mark your answer →Learn The diffraction grating 9702 grade boundaries

Frequently asked questions

How many The diffraction grating questions are there for 9702?: This page collects 6 recent Cambridge Physics (9702) past-paper questions tagged to The diffraction grating. Each links straight to instant marking against the official 9702 scheme.
How are The diffraction grating answers marked?: Type or photograph your working and MarkScheme scores it against the real 9702 mark scheme for this topic — method, accuracy and any band descriptors — so you see exactly where the marks are.
Where can I learn The diffraction grating first?: Start with the free Physics lesson on The diffraction grating, then come back and drill past-paper questions under timed conditions.