The wavelength range of the visible spectrum extends from violet (400 nm) to red (750nm). Express these wavelengths in frequencies (Hz) . (1nm `=10^(-9)`m)

Wavelength of the visible spectrum ranges from

The wavelength of a radiation emitted by a sodium lamp is 600 nm. Find the frequency ?

The wavelength of light in the visible region is about 390 nm for violet colour, about 550 nm (average wavelength ) for yellow - green colour and about 760 nm for red colour . (a ) What are the energies of photons in (ev) at the (i) violet end, (ii) average wavelength , yellow - green colour , and (ii) red end of the visible spectrum ? (Take h = 6.63 xx 10^(-34) J s and 1 eV= 1.6 xx 10^(-19) J ) ,

The wavelength of light in the visible region is about 390 nm for violet colour, about 550 nm (average wavelength ) for yellow - green colour and about 760 nm for red colour . From which of the photosensitive materials with work functions listed in table and using the results of (i) , (ii) and (iii) of (a) can you build a photoelectric device that operates with visible light ?

What is the wave number of a radiation of wavelength 400 nm ?

Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of (a) reflected, and (b) refracted light ? Refractive index of water is 1.33.