When light is refracted into a medium then,
 1 its wavelength and frequency both increase. 2 its wavelength increases but frequency remains unchanged. 3 its wavelength decreases but frequency remains unchanged. 4 its wavelength and frequency both decrease.

Subtopic: Â Huygens' Principle |
Â 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

When light is refracted, which of the following does not change?
1. wavelength
2. frequency
3. velocity
4. amplitude

Subtopic: Â Huygens' Principle |
Â 91%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The wavefronts of a light wave travelling in vacuum are given by $$x+y+z=c$$. The angle made by the direction of propagation of light with the X-axis is:
1. $$0^{\circ}$$
2. $$45^{\circ}$$
3. $$90^{\circ}$$
4. $${\cos^{-1}\left({1}/{\sqrt{3}}\right )}$$

Subtopic: Â Huygens' Principle |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The wavefronts of light coming from a distant source of unknown shape are nearly:
1. plane
2. elliptical
3. cylindrical
4. spherical

Subtopic: Â Huygens' Principle |
Â 67%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The inverse square law of intensity (i.e., the intensity $$\propto \frac{1}{r^2})$$ is valid for:
1. a point source
2. a line source
3. a plane source
4. a cylindrical source

Subtopic: Â Huygens' Principle |
Â 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A light wave can travel:

 (a) in vacuum (b) in vacuum only (c) in a material medium (d) in a material medium only
Choose the correct option:
 1 (a) and (b) 2 (b) and (c) 3 (a) and (c) 4 (c) and (d)

Subtopic: Â Huygens' Principle |
Â 88%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Huygens' principle of secondary wavelets may be used to:
 (a) find the velocity of light in a vacuum. (b) explain the particle behaviour of light. (c) find the new position of a wavefront. (d) explain Snell's law.
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. All of these
Subtopic: Â Huygens' Principle |
Â 62%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Light waves travel in vacuum along the X-axis. Which of the following may represent the wavefronts?
1. $$x=c$$
2. $$y=c$$
3. $$z=c$$
4. $$x+y+z=c$$

Subtopic: Â Huygens' Principle |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch