The mirror of length L moves horizontally as shown in the figure with a velocity v. The mirror is illuminated bya point source of light 'P' placed on the ground. The rate at which the length of the light spot on the ground increases is :

A point source of light is placed in front of a plane mirror.

A point source of light is placed in front of a plane mirror.

A point source of light is placed in front of a plane mirror.

A plane mirror of length 30 cm is placed horizontally along with a vertical screen. A monochromatic point source of light is placed 20 cm to the left off the left edge of the mirror, at a height of 2 mm above the plane of the mirror. If the wavelength of light used is 6400Å , then find the number of complete bright fringes formed.

A plane mirror of length 30 cm is placed horizontally along with a vertical screen. A monochromatic point source of light is placed 20 cm to the left off the left edge of the mirror, at a height of 2 mm above the plane of the mirror. If the wavelength of light used is 6400Å , then find the number of complete bright fringes formed.

A plane mirror is falling vertically as ssshown in the figure. If S is a point source of light, the rate of increase of the length AB is

A plane mirror is falling vertically as ssshown in the figure. If S is a point source of light, the rate of increase of the length AB is

A point source of light is placed in front of a plane mirror as shown in Figure. Determine the length of reflected path of light on the screen Sigma

A point source of light is placed in front of a plane mirror as shown in Figure. Determine the length of reflected path of light on the screen Sigma