Quiz for Wave Optics

Q1: What phenomenon demonstrates the wave nature of light?

A. Reflection B. Refraction C. Diffraction D. Polarization

Q2: What type of interference occurs when two waves meet in phase?

A. Constructive B. Destructive C. No interference D. Partial interference

Q3: Which of the following is not a necessary condition for interference?

A. Same amplitude B. Coherence C. Same frequency D. Constant phase difference

Q4: In Young’s double slit experiment, fringe width is given by?

A. λD/d B. d/λD C. λd/D D. Dλ/d

Q5: In Young’s experiment, if the slit separation is doubled, fringe width becomes?

A. Double B. Half C. Same D. Four times

Q6: Light shows polarization because it is a?

A. Longitudinal wave B. Transverse wave C. Mechanical wave D. Stationary wave

Q7: The central bright fringe in interference pattern is due to?

A. Constructive interference B. Destructive interference C. Diffraction D. Reflection

Q8: Fringe width in Young’s double slit experiment does not depend on?

A. Wavelength B. Slit separation C. Distance to screen D. Length of slits

Q9: If the wavelength of light is increased, fringe width will?

A. Increase B. Decrease C. Remain same D. Become zero

Q10: Which wave property is responsible for interference?

A. Amplitude B. Frequency C. Phase D. Velocity

Q11: The fringe width is independent of?

A. Distance to screen B. Wavelength C. Slit separation D. Intensity of source

Q12: In a double slit experiment, if monochromatic light is replaced by white light, the central fringe will be?

A. Colored B. Bright white C. Dark D. Inverted

Q13: In Young’s double slit experiment, path difference for 1st bright fringe is?

A. λ B. λ/2 C. 2λ D. Zero

Q14: Fringe visibility is maximum when?

A. Waves have different frequency B. Waves have equal intensity C. Waves have different phase D. None of the above

Q15: Wavefront is defined as?

A. Line joining points of equal pressure B. Surface of constant phase C. Curve of maximum velocity D. Plane of zero amplitude

Q16: Which theory explains diffraction of light?

A. Corpuscular theory B. Quantum theory C. Huygens’ principle D. Maxwell’s theory

Q17: In diffraction, width of central maximum is inversely proportional to?

A. Slit width B. Wavelength C. Amplitude D. Distance to screen

Q18: The unit of fringe width is?

A. Meter B. Second C. Candela D. Newton

Q19: Interference pattern disappears if?

A. Slits are non-coherent B. Same wavelength C. Equal amplitude D. Equal phase

Q20: Fringe width becomes zero when?

A. λ = 0 B. D = 0 C. d → ∞ D. All of these

Q21: The angular width of central maximum in single slit diffraction is?

A. 2λ/a B. λ/2a C. a/λ D. λa/2