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Question 20N.1.HL.TZ0.28

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1.HL.TZ0.28
Level HL Paper 1 Time zone TZ0
Command term Question number 28 Adapted from N/A
28.
[Maximum mark: 1]
20N.1.HL.TZ0.28

Light is incident on a diffraction grating. The wavelengths of two spectral lines of the light differ by 0.59 nm and have a mean wavelength of 590 nm. The spectral lines are just resolved in the fourth order of the grating. What is the minimum number of grating lines that were illuminated?

A.  25

B.  250

C.  1000

D.  4000

[1]

Markscheme

B

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