DP Physics (last assessment 2024)

Test builder »

Question 18M.2.HL.TZ1.8a

Select a Test
Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.2.HL.TZ1.8a
Level HL Paper 2 Time zone TZ1
Command term Show that Question number a Adapted from N/A
a.
[Maximum mark: 2]
18M.2.HL.TZ1.8a

Hydrogen atoms in an ultraviolet (UV) lamp make transitions from the first excited state to the ground state. Photons are emitted and are incident on a photoelectric surface as shown.

M18/4/PHYSI/HP2/ENG/TZ1/08

(a)

Show that the energy of photons from the UV lamp is about 10 eV.

[2]

Markscheme

E1 = –13.6 «eV» E2 = –  13.6 4 = –3.4 «eV»

energy of photon is difference E2 – E1 = 10.2 «≈ 10 eV»

 

Must see at least 10.2 eV.

[2 marks]

Syllabus sections