Answer:
1.1×10²¹ photon
Explanation:
Given data:
Wavelength of radiation = 5.10×10⁻⁴ cm
How many radiations required to liquid inorder to absorbed 42.75 J = ?
Solution:
First of all we will calculate the energy of radiation having 5.10×10⁻⁴ cm.
E = h.c/ λ
E = 6.63 ×10⁻³⁴ js × 3 ×10⁸ m/s / 0.051×10⁻⁴ m
E = 19.89 ×10⁻²⁶ j.m/ 0.051×10⁻⁴ m
E = 390 ×10⁻²² j
The energy of 1 photon with 5.10×10⁻⁴ cm. wavelength having 390 ×10⁻²² j energy.
1 photon × 42.75 J/390 ×10⁻²² j
0.11 ×10²²photon
1.1×10²¹ photon
