Suppose you are standing in the dark and facing a 20-W LED bulb 100 meters away. If the diameter of your pupils is about 8 mm under these conditions, about how many photons of visible light enter your eye every second? (Hint: the answer is about 6 billion photons per second)
Suppose you are standing in the dark and facing a 20-W LED bulb 100 meters away. If the diameter of your pupils is about 8 mm under these conditions, about how many photons of visible light enter your eye every second? (Hint: the answer is about 6 billion photons per second)
Modern Physics
3rd Edition
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Chapter3: The Quantum Theroy Of Light
Section: Chapter Questions
Problem 40P
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Question
Suppose you are standing in the dark and facing a 20-W LED bulb 100 meters away. If the diameter of your pupils is about 8 mm under these conditions, about how many photons of visible light enter your eye every second?
(Hint: the answer is about 6 billion photons per second)
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