Modern Physics Lecture 5

Modern Physics Lecture 5

University

5 Qs

quiz-placeholder

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Modern Physics Lecture 5

Modern Physics Lecture 5

Assessment

Quiz

Physics

University

Practice Problem

Hard

Created by

Dániel Varjas

Used 1+ times

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5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Atomic line spectra can be observed when light passes through _____.

a prism
a diffraction grating

none of these

either a prism or a diffraction grating

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which statements are true about Millikan's experiment?

It measured the mass to charge ratio of electrons.

It measured the charge of electrons.

It used charged oil droplets.

It used magnetic field to deflect cathode rays.

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which statements are true about Planck's radiation law?

The total radiated power is proportional to T4.

The total radiated power is infinite.

It is based on the assumption that energy is quantized.

The wavelength where maximal power is radiated is proportional to 1/T.

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

The photoelectric effect contradicts classical physics because ____.

the maximal kinetic energy of the emmitted electrons doesn't depend on the light intensity

electrons are only emmited above a threshold frequency

discrete charges are impossible in classical electrodynamics

classical theory doesn't allow electrons to escape matter

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which statements are true about the Compton effect?

It describes elastic scattering of photons on electrons.

It can only be explained using relativistic mechanics.

It is built on the assumption that light behaves like particles.

It predicts that the scattered photons will have a shorter wavelenght.