Sound wave from a point source are propagating in all directions. What will be ratio of amplitudes at distances of 9 m and 25 m from the source?

For light diverging from a point source.

The widths of two slits in an interference experiment ar in the ratio 9:1.What is the ratio of amplitudes and intensitites of light waves from them?

What is the amplitude of a point 0.375 m away from one end?

What type of wavefront will emerge from a point source?

Write the distances of these points from y-axis (9,0)

What is the shape of wave front originating from a point source

A point lies on negative direction of X-axis at a distance 6 units from Y-axis. What are its coordinates ?

From a point Q, the length of the tangent to a circle is 24 cm and the distance of Q from the centre is 25 cm. The radius of the circle is

A capacitro is made of two circular plates each of radius 0*25 m [Fig 1.09] .It is being charged by an external source.What is the magnetic field at a piont P at adistnce of 0.5 m from the entre of the plates in the plane midway between them,when the charging current is 1 A? .

A point source of gamma - radiatonhas a half-life of 30 minutes.The intitial count rate recorded by Geiger counter placed 2 m from the source is 360 s^(-1) .The distnace between the counter and the source is altered.After 1.5 hours,the count rate recorded is 5 s^(-1) .What is th new distnace between the counter and the source?