Question

What is the Wavelength of Light having Frequency $10^{15}$

Answer 1

Step-by-step explanation:

If frequency =3×10

5

Hz

E=hv

=6.626×10

−34

J/s−1×3×10

5

=19.878×10

−29

J

if λ=0.5×10

−10

we know c=λv

v=3×10

8

/0.5×10

−10

=6×10

18

E=hv

=6.626×10

−34

J/s−1×6×10

18

=3.97×10

−15

J

Answer 2

Answer:

Velocity= frequency x wavelength

Therefore; frequency= velocity / wavelength

=> frequency = 3 x 10^8 / 3x10 ^-3

= 10^11 Hz