Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

TopicSkillDifficulty

12 questions

SA-9702-SU3-0012 marksL1 FoundationCalculatorGrating equation

Light of wavelength

600

nm is incident normally on a grating with

500

lines per mm. Calculate the angle of the first-order maximum.

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SA-9702-SU3-0021 markL1 FoundationCalculatorGrating equation

A grating has

300

lines per mm. Calculate the slit spacing, in μm.

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SA-9702-SU3-0051 markL1 FoundationCalculatorOrders & spectra

Compared with a double slit, a diffraction grating produces maxima that are

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SA-9702-SU3-0071 markL1 FoundationCalculatorGrating equation

The first-order maxima on either side of the centre are each at

17.5^\circ

. Calculate the angle between them.

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SA-9702-SU3-0081 markL1 FoundationCalculatorGrating equation

A grating has slit spacing

2.0\times10^{-6}

m. Calculate the number of lines per metre, in units of

10^5

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SA-9702-SU3-0101 markL1 FoundationCalculatorOrders & spectra

When white light passes through a grating, the zero-order maximum is

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SA-9702-SU3-0121 markL1 FoundationCalculatorGrating equation

A grating with more lines per mm is used with the same light. The first-order maximum appears at

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SA-9702-SU3-0032 marksL2 StandardCalculatorOrders & spectra

For a grating with

d=2.00\times10^{-6}

m and light of wavelength

600

nm, determine the highest order of maximum that can be observed.

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SA-9702-SU3-0042 marksL2 StandardCalculatorGrating equation

A second-order maximum is seen at

36.9^\circ

with a grating of spacing

2.00\times10^{-6}

m. Calculate the wavelength, in nm.

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SA-9702-SU3-0061 markL2 StandardCalculatorOrders & spectra

White light falls on a diffraction grating. In the first-order spectrum, the colour closest to the zero-order maximum is

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SA-9702-SU3-0092 marksL2 StandardCalculatorGrating equation

Light of wavelength

500

nm falls normally on a grating with

d=2.5\times10^{-6}

m. Calculate the angle of the second-order maximum.

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SA-9702-SU3-0113 marksL3 ExamCalculatorOrders & spectra

Sodium light contains wavelengths of

589.0

nm and

589.6

nm. It falls normally on a grating with

600

lines per mm. Calculate the angular separation of the two lines in the second order, in degrees.

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