The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is

The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is

Options

(a) 11.2×10⁻¹⁷ J
(b) 12.9×10⁻¹⁶ J
(c) 1.7×10⁻¹⁵ J
(d) 10×10⁻¹⁶ J

Correct Answer:

12.9×10⁻¹⁶ J

Explanation:

Required ionization energy, E = hc / λ

E = 6.6 × 10⁻³⁴ × 3 × 10⁸ / 1.5 × 10⁻¹°

= 12.9 × 10⁻¹⁶ J

admin:

Related Questions

  1. Work done by an external agent in separating the parallel plate capacitor is
  2. For a particle in a non-uniform accelerated circular motion correct statement is
  3. An aeroplane flies 400m due to North and then 300m due to south and then flies
  4. Two identical capacitors each of capacitance 5 mF are charged potentials 2 kV and 1 kV
  5. A beam of light of wavelength 590 nm is focussed by a converging lens of diameter