A beam of light of wavelength `6000 xx 10^-8`cm passes from air to glass (n = 1.5). Find the wavelength.

A beam of light of wavelength 6000 xx 10^-8 cm passes from air to glass (n = 1.5). Find the velocity.

A beam of light consisting of two wavelengths 6500 A ˙ and 5200 A ˙ is used to obtain fringes in a Young's double slit experiment.Find the distance of the third bright fringe on the screen from central maximum for the wavelength 6500 A. The distance between the slits is 2mm and the distance between the plane of the slits and the screen is 120 cm

A convex lens of focal length 24 cm is totally immersed in water (n = 1.33). Find its focal length in water (n = 1.5).

Calculate the energy of a photon of wavelength 6 xx 10^(-5) cm.

A monochromatic source of light operating 200W emits 4xx10^(20) photons/sec. Find the wavelength of the light. Given h=6.63xx10^(-34)J-S,C=3xx10^8m//s .