Chemistry, asked by shawdaroga123, 7 months ago

Neon is generally used in sign signal boards. If it emits strongly at 616 nm, Calculate (i) frequency of emission.

(ii) distance travelled by this radiation in 30 s (iii) energy of quantum (v) number of quanta present if it produces 2 J

of energy.

Answers

Answered by amanbiswas121259

λ = wavelength = 616 nm

frequency of an electro magnetic radiation = f = c / λ

f = 2.98 * 10⁸ / 616 * 10⁻⁹ = 4.837 * 10¹⁴ Hz

distance = 2.98 * 10⁸ m/sec * 30 sec = 8.94 * 10⁹ meters

= 8,940,000 km

energy in one photon or quantum : E = h f = 6.626 * 10⁻³⁴ * 4.837 * 10¹⁴

= 3.205 * 10⁻¹⁹ J = 2 eV

number of quanta = energy / energy per quantum

= 2 J / 3.205 * 10⁻¹⁹

= 6.239 * 10¹⁸ number of p

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