The dispersion for a medium of wavelength `lambda` is D, then the dispersion for the wavelength `2lambda` will be

When a metal is illuminated by light of wavelength lambda , the stopping potential is V_@ and for wavelength 2lambda , it is 3V_@ .Then the threshold wavelength is ?

In Youngs double slit experiment the 7th maximum with wavelength lambda_1 is at a distance d_1 and that with wavelength lambda_2 is at distance d_2 . Then d_1//d_2=

In Young's double slit experiment the 7th maximum with wavelength lambda_(1) is at a distance d_(1) , and that with wavelength lambda_(2) is at distance d_(2) . Then d_(1)//d_(2) is

In Young's double slit experiment the 7th maximum with wavelength lambda_(1) is at a distance d_(1) , and that with wavelength lambda_(2) is at distance d_(2) . Then d_(1)//d_(2) is

A dye absorbs a photon of wavelength lambda and re - emits the same energy into two phorons of wavelengths lambda_(1) and lambda_(2) respectively. The wavelength lambda is related with lambda_(1) and lambda_(2) as :

A dye absorbs a photon of wavelength lambda and re - emits the same energy into two phorons of wavelengths lambda_(1) and lambda_(2) respectively. The wavelength lambda is related with lambda_(1) and lambda_(2) as :

A dye absorbs a photon of wavelength lambda and re - emits the same energy into two phorons of wavelengths lambda_(1) and lambda_(2) respectively. The wavelength lambda is related with lambda_(1) and lambda_(2) as :

When a metallic surface is illuminated with radiation of wavelength lambda , the stopping potential is V . If the same surface is illuminated with radiation of wavelength 2 lambda , the stopping potential is (V)/(4) . The threshold wavelength surface is : (a) 5lambda (b) (5)/(2)lambda (c) 3lambda (d) 4lambda

If lambda_(1), lambda_(2), lambda_(3) are the wavelengths of the waves giving resonance in the fundamental, first and second overtone modes respecively in a open organ pipe, then the ratio of the wavelengths lambda_(1) : lambda_(2) : lambda_(3) , is :