Question

1. The energy of a photon in Joules that has a wavelength of 9.0 m is:
(1) 6.0 ×10^-23
(2) 4.5 ×10^25
(3) 4.5 × 10^-25
(4)2.2 ×10^-26
Plz answer it step by step.

Answer 1

(4) 2.2×10⁻⁻²⁶


E(energy of photon)=$\frac{h c}{λ}$
  
                                  =6.63×10⁻³⁴×3.0×10$\frac{6.63×10⁻³⁴×3.0×10⁸}{9}$


                                 =2.2×10⁻²⁶ joules

Answer 2

Answer:

the correct answer is option number 3