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Edexcel A-Level Physics AS 2.3.34 Wave Equation Questions

Practise Edexcel IAL Physics 2.3.34 by applying v=fλ to microwave and sound data and explaining wavelength changes when frequency is fixed.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • use v=fλ or λ/T to calculate wave speed, frequency, wavelength or period
  • combine wave-equation calculations with sound, microwave or interference data
  • explain how wavelength must change when wave speed changes but frequency is fixed

Edexcel A-Level Physics AS 2.3.34 Wave Equation Questions question 1

[Maximum number: 2]

A student investigated the reflection of microwaves from a metal plate and a glass plate. The metal plate reflects microwaves and the glass plate partially reflects microwaves.

A plan view of the apparatus is shown.

The metal plate, the transmitter and the receiver were kept in fixed positions. The value of d was varied by moving the glass plate.

Figure for Question Edexcel A-Level Physics AS 2.3.34 Wave Equation Questions question 1 — Edexcel A-Level Physics AS
Figure for Question Edexcel A-Level Physics AS 2.3.34 Wave Equation Questions question 1 — Edexcel A-Level Physics AS

The student recorded values of d when the receiver showed a maximum value of intensity.

He recorded d for a sequence of five maxima.

Maxima | 1 | 2 | 3 | 4 | 5
d / cm | 9.9 | 11.1 | 12.7 | 13.9 | 15.4

Figure for Question Edexcel A-Level Physics AS 2.3.34 Wave Equation Questions question 1 — Edexcel A-Level Physics AS

Calculate the frequency of the microwaves being transmitted.

Frequency =

Figure for Question Edexcel A-Level Physics AS 2.3.34 Wave Equation Questions question 1 — Edexcel A-Level Physics AS
Figure for Question Edexcel A-Level Physics AS 2.3.34 Wave Equation Questions question 1 — Edexcel A-Level Physics AS
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