In Column-I, certain events are mentioned and in Column-II wavelengths are mentioned .Correctly match the event and the approximate wavelength in associated with it. [Use R = 1.09 × 107 , h = 6.626 × 10–34, hc = 12420 in SI unit]
Column I
(A) Cutoff wavelength of X ray when an acceleratingvoltage of 30 KV is applied
(B) De Broglie wavelength (in metre) of an electron having energy 2 eV
(C) Wavelength of a K photon emitted from an element with atomic number Z = 81.
(D) Wavelength of photons in a beam of intensity 5.7 W/m2 in which 1015 photons cross unit area in unit time (in )
Column II
(p) 3.473
(q) 0.19
(r) 0.41
(*) 8.64
