Energy by wavelength?
2016-11-02 4:14 am
Every second a lamp generates 9.8 × 10e20 photons with a wavelength of 434 nm. How much energy in kilojoules is produced at this wavelength?
回答 (2)
2016-11-02 4:53 am
✔ 最佳答案
Number of photons, N = 9.8 × 10²⁰Planck’s constant, h = 6.626 × 10⁻³⁴ J s
Speed of light, c = 3.00 × 10⁸ m/s
Wavelength, λ = 434 nm = 434 × 10⁻⁹ m
Energy produced
= N h c / λ
= (9.8 × 10²⁰) × (6.626 × 10⁻³⁴) × (3.00 × 10⁸) / (434 × 10⁻⁹) J
= 450 J
= 0.45 kJ
2016-11-02 4:18 am
7.6 KJ
收錄日期: 2021-05-01 13:07:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161101201415AA7Ox5P