Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 4

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The resultant of two waves travelling on a string along with the two waves is shown in the figure below.

Which of the following statements is false?

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Important Questions on Waves

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 5

Four different independent waves are represented by

(i) $y_{1} = a_{1} \sin ω t$

(ii) $y_{2} = a_{2} \sin 2 ω t$

(iii) $y_{3} = a_{3} \sin ω t$

(iv) $y_{4} = a_{4} \sin (ω t + \frac{π}{3})$

With which two waves, interference is possible?

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 6

In the case of light waves from two coherent sources S₁ and S₂, there will be constructive interference at an arbitrary point P, if the path difference S₁P - S₂P is

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 7

Three waves of equal frequency having amplitudes

10 mm

,

4 mm

, and

7 mm

arrive at a given point with a successive phase difference of

\frac{π}{2}

, the amplitude of the resulting wave in mm is given by

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 8

Two wave pulses travel in opposite directions on a string and approach each other. The shape of one pulse is inverted with respect to the other.

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 9

Three harmonic waves having equal frequency

v

and same intensity

I_{0}

, have phase angles

0, \frac{π}{4}

and

- \frac{π}{4}

respectively. When they are superimposed the intensity of the resultant wave is close to:

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 1

Assertion: The frequencies of incident, reflected and refracted beam of monochromatic light incident from one medium to another are same.

Reason: The incident, reflected and refracted rays are coplanar.

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 2

A pulse of a wave train travels along a stretched string and reaches the fixed end of the string. It will be reflected with

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 15 - Waves>Exercise>Q 3

When light is refracted from a surface, which of its following physical parameters does not change?