Wavelength and Frequency Video Lessons

Concept: The Electromagnetic Spectrum

# Problem: Ultraviolet light emits a total of 2.5 × 10 –17 J of light at a wavelength of 9.8 × 10 –7 m. How many photons does this correspond to? a) 1 b) 10 c) 25 d) 100 e) 125

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###### Problem Details

Ultraviolet light emits a total of 2.5 × 10 –17 J of light at a wavelength of 9.8 × 10 –7 m. How many photons does this correspond to?

a) 1

b) 10

c) 25

d) 100

e) 125

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Based on our data, we think this problem is relevant for Professor Yates' class at UK.