A 100-W bulb emits red light ( = 700 nm) uniformly in all directions. a) How many photons are emitted by the bulb each second? b) A dark-adapted eye can sense this light if as few as 50 photons per second enter the pupil. What is the largest distance from the bulb that light can be sensed? { Assume a pupil diameter of 5 mm. }
A 100-W bulb emits red light ( = 700 nm) uniformly in all directions. a) How many photons are emitted by the bulb each second? b) A dark-adapted eye can sense this light if as few as 50 photons per second enter the pupil. What is the largest distance from the bulb that light can be sensed? { Assume a pupil diameter of 5 mm. }
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![A 100-W bulb emits red light (1 = 700 nm) uniformly in all directions.
a) How many photons are emitted by the bulb each second?
b) A dark-adapted eye can sense this light if as few as 50 photons per second enter
the pupil. What is the largest distance from the bulb that light can be sensed?
{ Assume a pupil diameter of 5 mm. }](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F24b1d657-8a50-4e7c-90a8-6e71b5a64daf%2F1136427c-6437-4a17-b72e-8ee5804e38d2%2Fkg9a0l5_processed.png&w=3840&q=75)
Transcribed Image Text:A 100-W bulb emits red light (1 = 700 nm) uniformly in all directions.
a) How many photons are emitted by the bulb each second?
b) A dark-adapted eye can sense this light if as few as 50 photons per second enter
the pupil. What is the largest distance from the bulb that light can be sensed?
{ Assume a pupil diameter of 5 mm. }
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