1. The phenomenon in which waves of the same frequency and amplitude combine to enhance or cancel each other out is known as:
Answer:
Explanation:
Interference arises due to the superposition of two or more coherent waves.
2. Thomas Young's experiment which established the wave nature of light is:
Answer:
Explanation:
Young's double-slit experiment demonstrated the interference pattern of light, supporting its wave nature.
3. For constructive interference in a thin film, the path difference should be:
Answer:
Explanation:
Constructive interference occurs when the path difference is a whole number multiple of the wavelength (λ).
4. The phenomenon in which light spreads out as it passes through an aperture or around an obstacle is:
Answer:
Explanation:
Diffraction involves the bending and spreading of light waves around obstacles or through narrow openings.
5. When light waves undergo a change in their plane of vibration, it is termed as:
Answer:
Explanation:
Polarization refers to the orientation of oscillations in light waves to a specific direction.
6. In a diffraction pattern, the central maximum is:
Answer:
Explanation:
The central maximum in a diffraction pattern is the brightest and has a greater width than other fringes.
7. The phenomenon of light waves bending around the corners of an obstacle is:
Answer:
Explanation:
Diffraction leads to the bending of waves around obstacles and their spreading after passing through apertures.
8. The condition for maxima in the interference pattern of light is:
Answer:
Explanation:
For maxima or constructive interference, the path difference should be a whole number multiple of the wavelength.
9. In a single-slit diffraction experiment, the width of the slit affects:
Answer:
Explanation:
As the width of the slit decreases, the width of the central maximum increases.
10. The phenomenon of interference is evidence for:
Answer:
Explanation:
Interference arises from the superposition of waves, supporting the wave nature of light.
11. A plane of light in which vibrations occur in a single plane perpendicular to the direction of propagation is:
Answer:
Explanation:
Polarized light consists of waves with vibrations in a single plane.
12. The phenomenon which cannot be explained using ray optics but can be explained using wave optics is:
Answer:
Explanation:
Interference arises from the wave nature of light, and ray optics fails to provide an explanation for it.
13. A source of light which emits waves of coherent nature is:
Answer:
Explanation:
Sodium lamps emit light of a single wavelength, leading to coherence.
14. The phenomenon of light interacting with electrons of a material, imparting its energy to them is:
Answer:
Explanation:
In the photoelectric effect, light photons interact with material electrons, providing them with energy.
15. Brewster's angle is the angle of incidence for which:
Answer:
Explanation:
At Brewster's angle, the reflected light is completely polarized.
16. The change in the speed of light as it enters a different medium leads to:
Answer:
Explanation:
Refraction occurs due to the change in speed (and direction) of light as it moves from one medium to another.
17. The type of lens used to produce a divergent beam of light from a collimated beam is:
Answer:
Explanation:
A concave lens diverges parallel rays of light.
18. In Young's double-slit experiment, increasing the distance between the slits will:
Answer:
Explanation:
The fringe width is inversely proportional to the slit separation in Young's experiment.
19. The colors seen in soap bubbles are due to:
Answer:
Explanation:
Thin film interference gives rise to the colorful patterns seen in soap bubbles.
20. Huygens' principle is fundamental to the understanding of:
Answer:
Explanation:
Huygens' principle, which describes every point on a wavefront as a source of secondary wavelets, is central to wave optics.