DP Physics (last assessment 2024)

Test builder »

Question 18M.1.HL.TZ1.27

Select a Test
Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.HL.TZ1.27
Level HL Paper 1 Time zone TZ1
Command term Question number 27 Adapted from N/A
27.
[Maximum mark: 1]
18M.1.HL.TZ1.27

Monochromatic light of wavelength λ in air is incident normally on a thin film of refractive index n. The film is surrounded by air. The intensity of the reflected light is a minimum. What is a possible thickness of the film?

A.      λ 4 n

B.      3 λ 4 n

C.      λ n

D.      5 λ 4 n

[1]

Markscheme

C

Syllabus sections