The ratio of half-life times of two elements `A` and `B` is `(T_(A))/(T_(B))`. The ratio of respective decay constant `(lambda_(A))/(lambda_(B))`,is

The relation between half life (T) and decay constant (lambda) is

The half-life (T) and the mean-life (barT) are realted to the decay constant (lambda) as

The relationship between distintegration constant (lambda) and half-life (T) will be

Photons of energies 4.25eV and 4.7eV are incident on two metal surfaces A and B respectively.The maximum KE of emitted electrons are respectively T_(A)eV and T_(B)=(T_(A)-1.5)eV .The ratio de-Broglie wavelengths of photoelectrons from them is lambda_(A):lambda_(B)=1.2 ,then find the work function of A and B

Two spherical stars A and B emit black body radiation. The radius of A is 400 times that of B and A emits 10^(4) times the power emitted from B. The ratio (lambda_(A)//lambda_(B)) of their wavelengths lambda_(A) and lambda_(B) at which the peaks oc cur in their respective radiation curves is :

Two spherical starts A and B emit black body radiation. The radius of A is 400 times that of B and A emits 10^(4) times the power emitted from B. The ratio (lambda_(A)//lambda_(B)) of their wavelengths lambda_(A) and lambda_(B) at which the peaks oc cur in their respective radiation curves is :

Two spherical starts A and B emit black body radiation. The radius of A is 400 times that of B and A emits 10^(4) times the power emitted from B. The ratio (lambda_(A)//lambda_(B)) of their wavelengths lambda_(A) and lambda_(B) at which the peaks oc cur in their respective radiation curves is :

At t= 0 ,a sample of radionuclide A has the same decay rate as a sample of radionuclide B has at t = 60 min. The disintegration constants of A and B are lambda_(A) and lambda_(B) respectively, with lambda_(A) lt lambda_(B) .