DP Physics (first assessment 2025)

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Question 21M.1A.SL.TZ1.24

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.SL.TZ1.24
Level SL Paper 1A Time zone TZ1
Command term Question number 24 Adapted from N/A
24.
[Maximum mark: 1]
21M.1A.SL.TZ1.24

A simple model of an atom has three energy levels. The differences between adjacent energy levels are shown below.

What are the two smallest frequencies in the emission spectrum of this atom?

A.  0.5 × 1015 Hz and 1.0 × 1015 Hz

B.  0.5 × 1015 Hz and 1.5 × 1015 Hz

C.  1.0 × 1015 Hz and 2.0 × 1015 Hz

D.  1.0 × 1015 Hz and 3.0 × 1015 Hz

[1]

Markscheme

C

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