Question

The energy of photon of wavelength 450 nm is
(a) 2.5 × 10-17 J
(b) 1.25 × 10-17 J
(c) 4.4 × 10-19 J
(d) 2.5 × 10-19 J

Answer 1

Answer:

2.76 eV................

Answer 2

(c) 4.4 × 10-19

C= λv

C = speed of light

λ = wavelength

v = frequency

450 nm = 450 x 10-9 m

3.00 x 10^8 m/s = 450 x 10-9 m

v= 6.67 x 1014 Hz

E = hv

E = energy

h = planks constant

v = Frequency!!

E = 6.626 × 10-34 x 6.67 × 1014 1

E = 4.42 × 10-19 J

mark as brillienst answer