DP Physics (first assessment 2025)

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Question 20N.2.HL.TZ0.10a

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.2.HL.TZ0.10a
Level HL Paper 2 Time zone TZ0
Command term Show that Question number a Adapted from N/A
a.
[Maximum mark: 1]
20N.2.HL.TZ0.10a
(a)

Show that the wavelength of an electron in the beam is about 3×10-15 m.

[1]

Markscheme

λ=6.63×10-34×3×1081.60×10-19×4.2×108 OR =2.96×10-15«m» ✓


Answer to at least 2 s.f. (i.e. 3.0)

Examiners report

An easy calculation with only one energy conversion to consider and a 'show' answer to help. 

Syllabus sections