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# when the speed of light is independent of direction, the secondary waves are

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### Mohammed

Guys, does anyone know the answer?

get when the speed of light is independent of direction, the secondary waves are from screen.

## Relation between ray and wavefront is ______.

Relation between ray and wavefront is ______.

Relation between ray and wavefront is ______.

### OPTIONS

Rays are parallel to wavefront

Rays are at acute angle to wavefront

Rays are tangential to wavefront

Rays are perpendicular to wavefront

### SOLUTION

Relation between ray and wavefront is rays are perpendicular to wavefront.

Explanation:

The new wavefront is the forward envelope of the secondary waves, according to Huygens' architecture. Secondary waves are spherical when the speed of light is independent of direction. The rays are perpendicular to the wavefronts at this point.

Concept: Huygens' Principle

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## Assertion : Wavefronts obtained from light emitted by a point source in an isotropic medium are always spherical.

Click here👆to get an answer to your question ✍️ Assertion : Wavefronts obtained from light emitted by a point source in an isotropic medium are always spherical.

Question

Assertion

Reason

## Reason : Speed of light in isotropic medium is constant.

Reason : Speed of light in isotropic medium is constant. Assertion : Wavefronts obtained from light emitted by a point source in an isotropic medium are always spherical.

A

B

C

D

## If both assertion and reason are false

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Updated on : 2022-09-05

Solution Verified by Toppr

Correct option is A)

## When the speed of light is independent of direction, the secondary waves are spherical.

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## If assertion is true but reason is false.

When the speed of light is independent of direction, the secondary waves are spherical.

Assertion : Wavefronts obtained from light emitted by a point source in an isotropic medium are always spherical.

Reason : Speed of light in isotropic medium is constant.

NCERT FINGERTIPS-WAVE OPTICS-ASSERTION AND REASON

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Text Solution A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Solution

When the speed of light is independent of direction, the secondary waves are spherical.

Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

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तर्कः समानुवर्ती माध्यम में प्रकाश की चाल नियत होती है।

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Assertion : Wavefronts obtained from light emitted by a point source in an isotropic medium are always spherical.

Reason : Speed of light in isotropic medium is constant.

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In a isotropic medium,

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Spherical waves are emitted from a

1.0 W

source in an isotropic non-absorbing medium. What is the wave intesity

1.0 m from the source? 643183103 02:10

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Mohammed 10 day ago

Guys, does anyone know the answer?