54.4 eV

122.4 eV

13.6 eV

27.2 eV

ν against Z

ν against √Z

√ν against Z

None of these

Both a and b are independent of metal

b depends on metal and a is independent of metal

Both a and b are metal dependent

a is metal dependent while b is not

e

e²

1 ⁄ e²

0

2.79 x 10⁷ cm⁄s

9.27 x 10²⁷ cm⁄s

7.29 x 10⁷ cm⁄s

92.7 x 10⁷ cm⁄s