Home/MDCAT/MDCAT Physics Dawn of Modern Physics Test Online

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

Please wait...

Page 1 of 2

Uncategorized

1. What does the threshold frequency depend on?

Intensity of light

Speed of light

Nature of the metal

Direction of incidence

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

Threshold energy

Work function

Photon energy

Kinetic energy

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

Diffraction

Static electricity

Reflection

Blackbody radiation

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

Boltzmann constant

Planck’s constant

Avogadro number

Gravitational constant

5. What is a photon?

A particle of electricity

A massless atom

A quantum of light energy

A particle of sound

6. Which variable directly affects photon energy?

Velocity

Angle of incidence

Frequency

Wavelength

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

Decreases

Remains same

Increases

Depends on wavelength

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

No electrons are emitted

Electrons are emitted with high velocity

Light is reflected

Photon splits into electrons

9. The energy of a photon is given by:

E = hf

E = mc²

E = hf²

E = hv²

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

Zero

Infinite

Long

Short

11. The photoelectric effect is not observed when:

Light is monochromatic

Intensity is high

Frequency is below threshold

Light is polarized

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

Newton

Coulomb

Joule

Volt

13. The term “quantum” refers to:

A packet of energy

Frequency of a wave

Wave motion

Continuous flow of energy

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

Energy of the photon

Kinetic energy

Total energy

Work function

15. What happens to photon energy when frequency increases?

Remains the same

Increases

Becomes zero

Decreases

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

Green

Blue

Red

Violet

17. Which photon has more energy?

Ultraviolet

Red light

Infrared

Microwave

18. If frequency is doubled, photon energy becomes:

Doubled

Halved

Quadrupled

Unchanged

19. Photon is a quantum of:

Sound

Light

Heat

Electricity

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

Absorption spectrum of hydrogen

Speed of light in vacuum

Refraction through a prism

Total internal reflection

21. The dual nature of light was confirmed by:

Young

Einstein

Newton

Maxwell

22. As per quantum theory, energy is:

Conserved only in atoms

Quantized

Random

Continuous

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

Gamma rays

Radio waves

Ultraviolet

Infrared

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

Refraction

Photoelectric effect

Reflection

Diffraction

25. Who introduced the concept of quantized energy levels?

Newton

Einstein

Planck

Bohr

Page 2 of 2

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

Diffraction

Reflection

Interference

Photoelectric effect

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

Decreases

Stays the same

Increases

Becomes zero

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

Planck’s constant

Coulomb’s constant

Gravitational constant

Boltzmann constant

29. Which electromagnetic wave has the shortest wavelength?

Infrared

X-rays

Radio waves

Gamma rays

30. Who developed the concept of photons?

Einstein

Newton

Planck

Bohr

31. Which equation represents Einstein’s photoelectric equation?

E = mc²

E = hf – ϕ

E = hλ

E = hv + ϕ

32. What is the momentum of a photon?

h/λ

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

Heating matter

Vibrating air particles

Waving through space

Delivering discrete packets (photons)

34. Planck’s constant is denoted by:

35. The photoelectric effect supports which model of light?

Ray model

Huygens model

Quantum model

Wave model

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

Inverse

Quadratic

No relationship

Direct

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

Bohr

Planck

Rutherford

Einstein

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

It behaves like particles

It has mass

It is a continuous wave

It reflects at an angle

39. Who first explained blackbody radiation using quantum theory?

De Broglie

Bohr

Einstein

Planck

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

Zero

3 × 10⁸ m/s

Infinite

Varies with frequency

41. The speed of light in vacuum is:

9.81 m/s²

6.63 × 10⁻³⁴ J·s

1.6 × 10⁻¹⁹ C

3.00 × 10⁸ m/s

42. Which of the following is true about photons?

They travel at speed of light

They have mass

They have no energy

They are stationary

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

Wave-particle duality

Diffraction

Refraction

Polarization

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

Emission of sound

Photoelectric effect

Conduction in wire

Heating of metal

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

Emission spectra

Photon momentum

Interference

Photoelectric effect

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

Emission

Reflection

Ionization

Photoemission

47. Who proposed the particle nature of light?

Isaac Newton

Niels Bohr

James Clerk Maxwell

Albert Einstein

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

Photoelectric effect

Young’s double-slit experiment

Michelson-Morley experiment

Rutherford’s gold foil experiment

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

Atoms

Photons

Electrons

Waves

You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.

MDCAT Chemistry Gases Test Online
MDCAT Chemistry Industrial Chemistry Test Online
MDCAT Chemistry Aldehydes and Ketones Test Online
MDCAT Physics Alternating Current Test Online
MDCAT Physics Fluid Dynamics Test Online
MDCAT Physics Vactors And Equilibrium Test Online
MDCAT Chemistry Alcohols And Phenols Test Online
MDCAT Chemistry Alkyl Halides Test Online
MDCAT Biology Biotechnology Online Test
MDCAT Biology Homeostasis Online Test

Mustansar KhanLast Updated: May 26, 2025

Facebook Twitter Reddit WhatsApp Share via Email Print

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

Uncategorized

You Might Also Like

Mustansar Khan

Leave a Reply Cancel reply

Physics Dawn of Modern Physics MCQS Online Test

MDCAT Physics Dawn of Modern Physics Chapter Online Test

Uncategorized

You Might Also Like

Mustansar Khan

Your Related

Sindh Medical Universities MDCAT Test Result 2025 Answer Keys

Rawalpindi Medical College RMC Entry Test 2025 Dates Schedule Apply Online

MDCAT Chemistry Alcohols, Phenols And Ethers Online Test

MDCAT Chemistry of Hydrocarbons Test Online

MDCAT Biology Bioenergetics Test Online

MDCAT English Spotting Errors Test 7 Online

Leave a Reply Cancel reply