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MDCAT Physics Dawn of Modern Physics Test Online

Mustansar KhanLast Updated: May 26, 2025

Physics Dawn of Modern Physics MCQS Online Test

MDCAT Physics Dawn of Modern Physics Chapter Online Test

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:	MDCAT Entry Test Physics Online Test Interview Questions about Physics All Universities Entrance Test Recruitments Tests

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

Waving through space

Vibrating air particles

Heating matter

Delivering discrete packets (photons)

2. The term “quantum” refers to:

Frequency of a wave

Wave motion

A packet of energy

Continuous flow of energy

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

Reflection

Refraction

Diffraction

Photoelectric effect

4. Who introduced the concept of quantized energy levels?

Planck

Newton

Bohr

Einstein

5. Which electromagnetic wave has the shortest wavelength?

Radio waves

Gamma rays

X-rays

Infrared

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

Avogadro number

Gravitational constant

Boltzmann constant

Planck’s constant

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

Young’s double-slit experiment

Michelson-Morley experiment

Rutherford’s gold foil experiment

Photoelectric effect

8. Who developed the concept of photons?

Bohr

Newton

Planck

Einstein

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

Infinite

Short

Zero

Long

10. Which photon has more energy?

Microwave

Ultraviolet

Red light

Infrared

11. The photoelectric effect supports which model of light?

Huygens model

Ray model

Quantum model

Wave model

12. Planck’s constant is denoted by:

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

It behaves like particles

It reflects at an angle

It has mass

It is a continuous wave

14. What is a photon?

A particle of sound

A quantum of light energy

A particle of electricity

A massless atom

15. What is the momentum of a photon?

h/λ

16. Who first explained blackbody radiation using quantum theory?

Bohr

De Broglie

Einstein

Planck

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

Emission spectra

Photon momentum

Interference

Photoelectric effect

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

Reflection

Interference

Photoelectric effect

Diffraction

19. What happens to photon energy when frequency increases?

Decreases

Becomes zero

Increases

Remains the same

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

Radio waves

Ultraviolet

Gamma rays

Infrared

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

Energy of the photon

Kinetic energy

Total energy

Work function

22. As per quantum theory, energy is:

Quantized

Conserved only in atoms

Continuous

Random

23. Which equation represents Einstein’s photoelectric equation?

E = hf – ϕ

E = hv + ϕ

E = hλ

E = mc²

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

Reflection

Diffraction

Blackbody radiation

Static electricity

25. Who proposed the particle nature of light?

Albert Einstein

James Clerk Maxwell

Isaac Newton

Niels Bohr

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

Reflection

Emission

Photoemission

Ionization

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

Joule

Volt

Newton

Coulomb

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

Threshold energy

Work function

Kinetic energy

Photon energy

29. The photoelectric effect is not observed when:

Light is polarized

Frequency is below threshold

Intensity is high

Light is monochromatic

30. What does the threshold frequency depend on?

Nature of the metal

Direction of incidence

Intensity of light

Speed of light

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

Increases

Becomes zero

Decreases

Stays the same

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

Bohr

Einstein

Planck

Rutherford

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

Quadratic

Direct

Inverse

No relationship

34. The speed of light in vacuum is:

3.00 × 10⁸ m/s

1.6 × 10⁻¹⁹ C

6.63 × 10⁻³⁴ J·s

9.81 m/s²

35. Photon is a quantum of:

Electricity

Heat

Sound

Light

36. The energy of a photon is given by:

E = hf

E = hf²

E = hv²

E = mc²

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

No electrons are emitted

Light is reflected

Photon splits into electrons

Electrons are emitted with high velocity

38. Which of the following is true about photons?

They have no energy

They are stationary

They have mass

They travel at speed of light

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

3 × 10⁸ m/s

Zero

Infinite

Varies with frequency

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

Emission of sound

Heating of metal

Photoelectric effect

Conduction in wire

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

Polarization

Refraction

Diffraction

Wave-particle duality

42. Which variable directly affects photon energy?

Wavelength

Velocity

Angle of incidence

Frequency

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

Green

Violet

Red

Blue

44. The dual nature of light was confirmed by:

Einstein

Maxwell

Young

Newton

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

Increases

Depends on wavelength

Decreases

Remains same

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

Photons

Atoms

Electrons

Waves

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

Boltzmann constant

Gravitational constant

Planck’s constant

Coulomb’s constant

48. If frequency is doubled, photon energy becomes:

Quadrupled

Halved

Unchanged

Doubled

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

Total internal reflection

Refraction through a prism

Absorption spectrum of hydrogen

Speed of light in vacuum

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Mustansar KhanLast Updated: May 26, 2025

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MDCAT Physics Dawn of Modern Physics Test Online

Physics Dawn of Modern Physics MCQS Online Test

MDCAT Physics Dawn of Modern Physics Chapter Online Test

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Physics Dawn of Modern Physics MCQS Online Test

MDCAT Physics Dawn of Modern Physics Chapter Online Test

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Mustansar Khan

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