Sarthaks APP
0 votes
551 views
in Chemistry by (66.2k points)

What is the number of photons with a wavelength of 4000 pm that provide 1 J of energy?

1 Answer

+1 vote
by (64.2k points)
selected by
 
Best answer

Wavelength of light, λ = 4000 pm = 4000 x 10-12 m

Energy provided, E = 1 J

Energy per photon = hc/λ

If N is the number of photons that provide 1 J energy, we can write

1 J = N x hc/λ

or, N = {1 J x λ}/{hc}

= {15 x 4000 x 10-12 m}/{6.626 x 10-34 Js x 3 x 108 m/s}

= 2.012 x 1016

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...