Free Optics MCQs with Answers
665 Optics MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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665 questions · page 28 of 34
- A. Phase coherence
- B. Monochromatic
- C. Both phase coherence and monochromatic
- D. None of these
Explanation: The correct answer is Option C. To achieve clear interference patterns, the light source must be both phase coherent and monochromatic.
Correct answer: Both phase coherence and monochromatic542. In photoelectric effect, K.E. of an ejected electron depends upon the following property of light:
- A. Intensity
- B. Frequency
- C. Wavelength
- D. None of these
Explanation: B is the correct answer. The key factor influencing the photoelectric effect is the frequency of the incident light.
Correct answer: Frequency- A. P = mλ
- B. P = 2 mλ
- C. P = 1/2 mλ
- D. None of these
Explanation: The expression for the wavelength of light in Michelson's interferometer is given by P = 1/2 mλ.
Correct answer: P = 1/2 mλ- A. Huygen's principle
- B. Michelson interferometer
- C. Young's double slit experiment
- D. Bragg's formula
Explanation: Huygen's principle is the correct answer because it describes how each point on a wave front can act as a source of secondary spherical…
Correct answer: Huygen's principle- A. Refraction
- B. Reflection
- C. Interference
- D. Dispersion
Explanation: Dispersion is the correct answer. It refers to the separation of different colors of light due to variations in their refractive indices.
Correct answer: Dispersion- A. Polarisation
- B. Diffraction
- C. Interference
- D. Refraction
Explanation: The Explanation for this question will be added soon!
Correct answer: Polarisation- A. The sources should be monochromatic
- B. The sources should be phase coherent
- C. The linear supper-position should be applicable
- D. All of these
Explanation: The Explanation for this question will be added soon!
Correct answer: All of these- A. Integral multiple of λ /2
- B. ntegral multiple of λ
- C. Odd integral multiple of λ /2
- D. Even integral multiple of λ
Explanation: The Explanation for this question will be added soon!
Correct answer: ntegral multiple of λ- A. Diffraction
- B. Reflection
- C. Interference
- D. Polarisation
Explanation: The Explanation for this question will be added soon!
Correct answer: Interference- A. Shift theorem
- B. Dppler's shift
- C. Polarization
- D. None of these
Explanation: Change in frequency of wave (radio wave or light) , this phenomenon is called Dopplers effect.
Correct answer: Dppler's shift- A. Chistian Huygens
- B. Francesco Gimaldi
- C. Thomas Young
- D. Augustian Fresnel
Explanation: Francesco Gimaldi discovered the phenomenon of light diffraction and pointed out it resembles the behaviour of wave.
Correct answer: Francesco Gimaldi- A. Frequency
- B. Intensity
- C. Amplitude
- D. None of these
Explanation: A is the correct answer. According to the equation E=hν, where E is the energy of a photon, h is Planck's constant, and ν is the frequency…
Correct answer: Frequency- A. Interference
- B. Diffraction
- C. Dispersion
- D. Polarization
Explanation: The colors in soap films are produced due to interference. When light hits a soap film, it is reflected from both the front and back…
Correct answer: Interference- A. Newton
- B. Compton
- C. Maxwell
- D. Huygens
Explanation: The correct answer is Maxwell. James Clerk Maxwell developed the electromagnetic wave theory, encapsulated in Maxwell's equations, which…
Correct answer: Maxwell- A. Thomas Young
- B. Newton
- C. Maxwell
- D. Huygens
Explanation: Thomas Young is credited with the first experimental demonstration of the wave nature of light through the double-slit experiment, which…
Correct answer: Thomas Young- A. Waves
- B. Particles
- C. Both waves and particles
- D. None of these
Explanation: The photoelectric effect is a phenomenon where electrons are emitted from a material when it is exposed to light.
Correct answer: Particles- A. Interference
- B. Diffraction
- C. Polarization
- D. Compton effect
Explanation: The Compton effect cannot be explained by the wave nature of light because it involves the interaction of photons with electrons, which is…
Correct answer: Compton effect- A. Photoelectric effect
- B. Interference
- C. Compton effect
- D. Pair production
Explanation: The correct answer is Interference. Interference is a phenomenon that can only be explained by the wave nature of light.
Correct answer: Interference- A. Newton
- B. Thomas Young
- C. Huygen
- D. Fresnel
Explanation: The correct answer is Huygen. Christiaan Huygens proposed the wave theory of light, which describes light as a wave phenomenon.
Correct answer: Huygen- A. Amplitude
- B. Trough
- C. Crest
- D. Wave front
Explanation: The correct answer is Wave front. A wave front is defined as the locus of all points in a medium that have the same phase of vibration.
Correct answer: Wave front