DP Physics (first assessment 2025)

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Question 21M.1A.HL.TZ1.40

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.HL.TZ1.40
Level HL Paper 1A Time zone TZ1
Command term Question number 40 Adapted from N/A
40.
[Maximum mark: 1]
21M.1A.HL.TZ1.40

What was a reason to postulate the existence of neutrinos?

A. Nuclear energy levels had a continuous spectrum.

B. The photon emission spectrum only contained specific wavelengths.

C. Some particles were indistinguishable from their antiparticle.

D. The energy of emitted beta particles had a continuous spectrum.

[1]

Markscheme

D

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