Physics Dawn of Modern Physics Online Mcqs Test

Q: How can I prepare for Physics Dawn of Modern Physics Online Mcqs Test?

You can prepare for Physics Dawn of Modern Physics Online Mcqs Test by attempting the free online quizzes at Gotest.com.pk. We provide instant results, performance reports, and detailed explanations for every question.

Question 1

1. Which property of light is explained only by the particle model?

Answer

Interference

Answer

Diffraction

Answer

Reflection

Answer

Photoelectric effect

Question 2

2. Which unit is used to measure the energy of a photon?

Question 3

3. The term “quantum” refers to:

Answer

Continuous flow of energy

Answer

Wave motion

Answer

A packet of energy

Answer

Frequency of a wave

Question 4

4. What does “hf” represent in the photoelectric effect?

Answer

Kinetic energy

Answer

Energy of the photon

Answer

Total energy

Answer

Work function

Question 5

5. Which scientist received the Nobel Prize for explaining the photoelectric effect?

Answer

Rutherford

Question 6

6. Which electromagnetic wave has the shortest wavelength?

Answer

Radio waves

Answer

Gamma rays

Question 7

7. Photon is a quantum of:

Answer

Electricity

Question 8

8. The photoelectric effect supports which model of light?

Answer

Wave model

Answer

Huygens model

Answer

Quantum model

Question 9

9. Which equation represents Einstein’s photoelectric equation?

Answer

E = hf – ϕ

Answer

E = hv + ϕ

Question 10

10. The energy of a photon is given by:

Question 11

11. Which of the following supports the particle nature of light?

Answer

Diffraction

Answer

Refraction

Answer

Photoelectric effect

Answer

Reflection

Question 12

12. What does the threshold frequency depend on?

Answer

Nature of the metal

Answer

Direction of incidence

Answer

Speed of light

Answer

Intensity of light

Question 13

13. If frequency is doubled, photon energy becomes:

Answer

Quadrupled

Question 14

14. Who proposed the particle nature of light?

Answer

Albert Einstein

Answer

James Clerk Maxwell

Answer

Niels Bohr

Answer

Isaac Newton

Question 15

15. Which aspect of light is explained by wave theory, not particle theory?

Answer

Photon momentum

Answer

Photoelectric effect

Answer

Interference

Answer

Emission spectra

Question 16

16. What is a photon?

Answer

A massless atom

Answer

A quantum of light energy

Answer

A particle of sound

Answer

A particle of electricity

Question 17

17. Which of the following best demonstrates the quantized nature of light?

Answer

Absorption spectrum of hydrogen

Answer

Speed of light in vacuum

Answer

Refraction through a prism

Answer

Total internal reflection

Question 18

18. What is the relationship between photon energy and wavelength?

Answer

No relationship

Question 19

19. What constant is used in the formula E = hf?

Answer

Planck’s constant

Answer

Gravitational constant

Answer

Coulomb’s constant

Answer

Boltzmann constant

Question 20

20. The speed of light in vacuum is:

Answer

3.00 × 10⁸ m/s

Answer

6.63 × 10⁻³⁴ J·s

Answer

1.6 × 10⁻¹⁹ C

Answer

9.81 m/s²

Question 21

21. Which phenomenon shows both wave and particle nature of light?

Answer

Diffraction

Answer

Wave-particle duality

Answer

Polarization

Answer

Refraction

Question 22

22. As per quantum theory, energy is:

Answer

Continuous

Answer

Conserved only in atoms

Question 23

23. According to the particle model, light transfers energy by:

Answer

Waving through space

Answer

Heating matter

Answer

Delivering discrete packets (photons)

Answer

Vibrating air particles

Question 24

24. The minimum energy required to remove an electron from a metal surface is called:

Answer

Threshold energy

Answer

Photon energy

Answer

Work function

Answer

Kinetic energy

Question 25

25. The photoelectric effect is not observed when:

Answer

Light is monochromatic

Answer

Light is polarized

Answer

Intensity is high

Answer

Frequency is below threshold

Question 26

26. What is the momentum of a photon?

Question 27

27. Who developed the concept of photons?

Question 28

28. Who introduced the concept of quantized energy levels?

Question 29

29. Which photon has more energy?

Answer

Ultraviolet

Question 30

30. The dual nature of light was confirmed by:

Question 31

31. Which of the following is true about photons?

Answer

They have no energy

Answer

They are stationary

Answer

They have mass

Answer

They travel at speed of light

Question 32

32. Which of the following constants is required to calculate photon energy?

Answer

Planck’s constant

Answer

Avogadro number

Answer

Gravitational constant

Answer

Boltzmann constant

Question 33

33. What happens to photon energy when frequency increases?

Answer

Remains the same

Answer

Becomes zero

Question 34

34. The color of light with the lowest photon energy is:

Question 35

35. Which experiment provided evidence for the particle nature of light?

Answer

Michelson-Morley experiment

Answer

Young’s double-slit experiment

Answer

Photoelectric effect

Answer

Rutherford’s gold foil experiment

Question 36

36. What happens to the kinetic energy of emitted electrons when light intensity is increased?

Answer

Depends on wavelength

Answer

Remains same

Question 37

37. Which form of radiation has the highest photon energy?

Answer

Gamma rays

Answer

Ultraviolet

Answer

Radio waves

Question 38

38. What is the speed of all photons in a vacuum?

Answer

3 × 10⁸ m/s

Answer

Varies with frequency

Question 39

39. What is the wavelength of a photon with high energy?

Question 40

40. The concept of quantized light energy resolved the problem of:

Answer

Static electricity

Answer

Blackbody radiation

Answer

Reflection

Answer

Diffraction

Question 41

41. Who first explained blackbody radiation using quantum theory?

Answer

De Broglie

Question 42

42. If the frequency of incident light is less than the threshold frequency:

Answer

No electrons are emitted

Answer

Light is reflected

Answer

Electrons are emitted with high velocity

Answer

Photon splits into electrons

Question 43

43. Which variable directly affects photon energy?

Answer

Angle of incidence

Answer

Wavelength

Question 44

44. Which term describes the ability of photons to eject electrons?

Answer

Ionization

Answer

Photoemission

Answer

Reflection

Question 45

45. In the particle model of light, light is composed of:

Question 46

46. Which process requires photons to have energy greater than the work function?

Answer

Photoelectric effect

Answer

Emission of sound

Answer

Heating of metal

Answer

Conduction in wire

Question 47

47. As frequency increases, what happens to the photon’s wavelength?

Answer

Becomes zero

Answer

Stays the same

Question 48

48. Planck’s constant is denoted by:

Question 49

49. What does the equation E = hf suggest about light?

Answer

It has mass

Answer

It is a continuous wave

Answer

It reflects at an angle

Answer

It behaves like particles

Question 50

Loading...

Total Questions:	49
Time Allowed:	25 Minutes
Total Marks:	49
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Physics Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Physics Interview Question Answer

Physics Dawn of Modern Physics Online Mcqs Test

Important Dawn of Modern Physics Question and Answer

Dawn of Modern Physics Practice Test Online With Explanation

Uncategorized

How to Score High in Physics Dawn of Modern Physics Online Mcqs Test?

Key Preparation Tips:

Mustansar Khan

Leave a Reply Cancel reply

Important Dawn of Modern Physics Question and Answer

Dawn of Modern Physics Practice Test Online With Explanation

Uncategorized

How to Score High in Physics Dawn of Modern Physics Online Mcqs Test?

Key Preparation Tips:

Related Content

Mustansar Khan

Leave a Reply Cancel reply