d (d) For a travelling wave, the intensity of wave remainsconstant if it is a plane wave. Intensity of wave is inversely proportional to the square of the distance from the source if the wave is spherical $\left( {I = \frac{P}{{4\pi {r^2}}}} \right)$ Intensity of spherical wave on the spherical surface centred at source always remains same. Here total intensity means power $P$.

The wave intensity remains constant for a plane wave

Total intensity of the spherical wave over the spherical surface centered at the source remains constant at all times

The wave intensity decreases as the inverse square of the distance from the source for a spherical wave

d (d) For a travelling wave, the intensity of wave remainsconstant if it is a plane wave. Intensity of wave is inversely proportional to the square of the distance from the source if the wave is spherical $\left( {I = \frac{P}{{4\pi {r^2}}}} \right)$ Intensity of spherical wave on the spherical surface centred at source always remains same. Here total intensity means power $P$.

As a wave propagates

SECTION - A [PHYSICS - MCQ]

GSEB - English Medium

A
The wave intensity remains constant for a plane wave
B
Total intensity of the spherical wave over the spherical surface centered at the source remains constant at all times
C
The wave intensity decreases as the inverse square of the distance from the source for a spherical wave
D
All of the above.

IIT 1999, Medium

STD 11 Science
NEET
STD 11 - 14. waves and sound
Physics

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