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Solution - Estimating the Following Two Numbers Should Be Interesting the Number of Photons Entering the Pupil of Our Eye per Second Corresponding to the Minimum Intensity of White Light that We Humans Can Perceive (∼10−10 W M−2). Take the Area of the Pupil to Be About 0.4 Cm2, and the Average Frequency of White Light to Be About 6 × 1014 Hz - Particle Nature of Light: the Photon

ConceptParticle Nature of Light: the Photon

Question

Estimating the following two numbers should be interesting. The first number will tell you why radio engineers do not need to worry much about photons! The second number tells you why our eye can never ‘count photons’, even in barely detectable light.

The number of photons entering the pupil of our eye per second corresponding to the minimum intensity of white light that we humans can perceive (∼10−10 W m−2). Take the area of the pupil to be about 0.4 cm2, and the average frequency of white light to be about 6 × 1014 Hz.

Solution

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APPEARS IN

NCERT Physics Textbook for Class 12 Part 2
Chapter 11: Dual Nature of Radiation and Matter
Q: 25.2 | Page no. 409

Reference Material

Solution for question: Estimating the Following Two Numbers Should Be Interesting the Number of Photons Entering the Pupil of Our Eye per Second Corresponding to the Minimum Intensity of White Light that We Humans Can Perceive (∼10−10 W M−2). Take the Area of the Pupil to Be About 0.4 Cm2, and the Average Frequency of White Light to Be About 6 × 1014 Hz concept: Particle Nature of Light: the Photon. For the courses CBSE (Arts), CBSE (Commerce), CBSE (Science)
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