The sodium frame test has a characteristic yellow colour due to the emissions of wavelength 589nm. What is the mass equivalence of one photon of this wavelength?

The sodium frame test has a characteristic yellow colour due to the em

1.	The sodium frame test has a characteristic yellow colour due to the emissions of wavelength 589nm. What is the mass equivalence of one photon of this wavelength?
Answer» Solution :`lamda = (h)/(mv) or m = (h)/(lamda xx V) = (6.626 xx 10^(-34) KG m^(2) s^(-1))/((589 xx 10^(-9)) (3 xx 10^(8) ms^(-1))) = 3.75 xx 10^(-36) kg`