how many photons of light having a wavelength of 5000A are necessary to provide 1 joule of energy??
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62
Convert angstrom to metres :
5000 × 10⁻¹⁰ = 5 × 10⁻⁷ m
h = 6.62 × 10⁻³⁴
C = 3 × 10⁸
Y = 5 × 10⁻⁷ m
E = h(C/Y)
Doing the substitution :
E = 6.62 × 10⁻³⁴(3 × 10⁸ ÷ 5 × 10⁻⁷) = 3.972 × 10⁻¹⁹ Joules
1 ÷ (3.972 × 10⁻¹⁹) = 2.5 × 10¹⁸ Photons
5000 × 10⁻¹⁰ = 5 × 10⁻⁷ m
h = 6.62 × 10⁻³⁴
C = 3 × 10⁸
Y = 5 × 10⁻⁷ m
E = h(C/Y)
Doing the substitution :
E = 6.62 × 10⁻³⁴(3 × 10⁸ ÷ 5 × 10⁻⁷) = 3.972 × 10⁻¹⁹ Joules
1 ÷ (3.972 × 10⁻¹⁹) = 2.5 × 10¹⁸ Photons
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3
Answer:
above one is verified and correct
Explanation:
copy from that
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