Question

7. Calculate the energy of a photon of blue light, λ=450 nm in air (or vacuum) a. 1.47×10−27 J b. 4.4×10−19 J c. 32×10−5 J d. 1.47×10−36 J 8. Suppose a star has a surface temperature of 5,800 K. What is the peak wavelength of this star?

Answer 1

Answer:Energy of photon =hc∧

= 6.626*10⁻³⁴*3*10⁸**450*10⁻⁹

on solving we get energy=4.4*10⁻¹⁹J.