Grade 11Modern Physics
Ultraviolet radiations of 6.2 eV falls on an aluminium surface. K.E. of fastest electron emitted is (work function = 4.2 eV)
(a) 3.2 × 10-21 J
(b) 3.2 × 10-19 J
(c) 7 × 10-25 J
(d) 9 × 10-32 J
Ultraviolet radiations of 6.2 eV falls on an aluminium surface. K.E. of fastest electron emitted is (work function = 4.2 eV)
(a) 3.2 × 10-21 J
(b) 3.2 × 10-19 J
(c) 7 × 10-25 J
(d) 9 × 10-32 J
