Question

Find energy when frequency is 3×10invest 10 Hz

Answer 1

Answer:

The energy of photon is

E=hν=6.626×10

−34

Js×3×10

15

m/s

=1.988×10

−18

J

(ii) The energy of photon is

E=

λ

hc

=

0.50×10

−10

m

6.626×10

−34

Js×3×10

8

=3.98×10

−15

s

Explanation:

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Answer 2

Answer:

Energy = 19.878 * 10⁻²⁴ J

Explanation:

$\diamond$ Energy 'E' of a wave having frequency 'ν' is given by the equation,

$\boxed{E = h \nu}$

$\diamond$ In the given equation,

$\implies$ E is the energy of the wave

$\implies$ h is the Plancks constant

$\implies$ ν is the frequency of the wave

$\diamond$ We know that,

$\implies$ h = Plancks constant = 6.626 * 10⁻³⁴ m² kg/s

$\implies$ ν = Frequency = 3 * 10¹⁰ Hz

$\diamond$ Putting these values in the equation we get,

$\boxed{E = h \nu}$

$\implies$ E = $6.626 * 10^{-34} * 3 * 10^{10}$

$\implies$ E = 19.878 * 10⁻²⁴ J