If the approximate energy of a photon present in an X-ray is 8.0 × 10-15 joules, what's the frequency of the X-ray? Given: Planck's constant is 6.63 × 10-34 joule·seconds.
(A)1.2 × 1014 hertz
(B)1.2 × 1019 hertz
(C)8.2 × 1018 hertz
(D)8.3 × 1019 hertz

Planck's law states that the energy from radiation is emitted in packets of energy called photon. The energy of each photon is directly proportional to the frequency. Mathematically:

[tex]E = h\nu\\\\\nu=\frac{E}{h}[/tex]

where,

[tex]\nu[/tex] = frequency = ?
E = energy = 8 x 10⁻¹⁵ J
h = Planck's Constant = 6.63 x 10⁻³⁴ J.s

Therefore,

[tex]\nu=\frac{8\ x\ 10^{-15}\ J}{6.63\ x\ 10^{-34}\ J.s}[/tex]

ν = 1.2 x 10¹⁹ Hz

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If the approximate energy of a photon present in an X-ray is 8.0 × 10-15 joules, what's the frequency of the X-ray? Given: Planck's constant is 6.63 × 10-34 joule·seconds. (A)1.2 × 1014 hertz (B)1.2 × 1019 hertz (C)8.2 × 1018 hertz (D)8.3 × 1019 hertz

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Planck's Law

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If the approximate energy of a photon present in an X-ray is 8.0 × 10-15 joules, what's the frequency of the X-ray? Given: Planck's constant is 6.63 × 10-34 joule·seconds.
(A)1.2 × 1014 hertz
(B)1.2 × 1019 hertz
(C)8.2 × 1018 hertz
(D)8.3 × 1019 hertz