The number of photons `(lambda = 6630 Å)` that strije per second on a totoally reflecting screen (as shown in figure), so that a force of `1N` is exerted on the screen, is approximentely).

The number of photons (lambda = 6630 Å) that strike per second on a totoally reflecting screen (as shown in figure), so that a force of 1N is exerted on the screen, is approximentely).

Three coherent point sources S_(1),S_(2) and S_(3) are placed on a line perpendicular to the screen as shown in the figure. The wavelength of the light emitted by the sources is lambda. The distance between adjacent sources is d=3lambda The distance of S_(2) from the screen is D (gtgt lambda) . Find the minimum (non zero) distance x of a point P on the screen at which complete darkness is obtained.

Photons of wavelength lamda=662 nm are incident normally on a perfectly reflecting screen. Calculate their number of photons per second falling on the screen such that the exerted force is 1 N.

Two coherent monochromatic point sources S_1 and S_2 are placed in front of an infinite screen as shown in figure. Wavelength of the light emitted by both the sources is zero. Initial phase difference between the sources is zero. Initially S_(1)S_(2)=2.5 lambda and the number of bright circular rings on the screen in n_(1) . if the distance S_(1)S_(2) is increased and made 5.7 lambda , the number of bright circular rings becomes n_(2) . the difference n_(2)-n_(1) is

Two coherent monochromatic point sources S_1 and S_2 are placed in front of an infinite screen as shown in figure. Wavelength of the light emitted by both the sources is zero. Initial phase difference between the sources is zero. Initially S_(1)S_(2)=2.5 lambda and the number of bright circular rings on the screen in n_(1) . if the distance S_(1)S_(2) is increased and made 5.7 lambda , the number of bright circular rings becomes n_(2) . the difference n_(2)-n_(1) is

Interference effects are produced at point P on a screen as a result of direct rays from a 500 nm source and reflected rays from a mirror, as shown in figure. If the sources is 100m to the left of the screen and 1.00 cm above the mirror, find the distance y (in milimeters) to the first dark band above the mirror.

Interference effects are produced at point P on a screen as a result of direct rays from a 500 nm source and reflected rays from a mirror, as shown in figure. If the sources is 100m to the left of the screen and 1.00 cm above the mirror, find the distance y (in milimeters) to the first dark band above the mirror.

The energy levels of a hypotherical one electron atom are shown in figure Find the wave number of the photon emitted for the transition n = 3 to n = 1

The energy levels of a hypotherical one electron atom are shown in figure Find the wave number of the photon emitted for the transition n = 3 to n = 1

Photons of wavelength lamda=662 nm are incident normally on a perfectly reflecting screen. Calculate their number per second falling on the screen such that the exerted force is 1 N.