DP Physics (last assessment 2024)

Test builder »

Question 19N.2.HL.TZ0.11a(ii)

Select a Test
Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.2.HL.TZ0.11a(ii)
Level HL Paper 2 Time zone TZ0
Command term Explain Question number a(ii) Adapted from N/A
a(ii).
[Maximum mark: 2]
19N.2.HL.TZ0.11a(ii)

Monochromatic light of very low intensity is incident on a metal surface. The light causes the emission of electrons almost instantaneously. Explain how this observation

(a(ii))

does support the photon nature of light.

[2]

Markscheme

«in the photon theory of light» the electron interacts with a single photon ✔
and absorbs all the energy OR and can leave the metal immediately ✔

NOTE: Reference to photon-electron collision scores MP1

Syllabus sections