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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 28 - Dual Nature of Radiation and Matter > A photosensitive material is at 9 m to the left of the origin and the source of light is at 7 m to the right of the origin along x-axis. The photosensitive material and the source of light start from rest and move, respectively, with 8iˆms^−1 and 4iˆms^−1. The ratio of intensities at t=0 to t=3s as received by the photosensitive material is

A photosensitive material is at 9 m to the left of the origin and the source of light is at 7 m to the right of the origin along x-axis. The photosensitive material and the source of light start from rest and move, respectively, with 8iˆms^−1 and 4iˆms^−1. The ratio of intensities at t=0 to t=3s as received by the photosensitive material is

How many photons are emitted per second by a 5 m W laser source operating at 632.8 nm?