Explanation Given data: Wavelength of the radiation is 680 nm. Formula used: Write the expression for energy of the photon. E photon = h f (1) Here, E photon is the energy of the photon, h is the plank’s constant with value as 6.63 × 10 − 34 J ⋅ s , and f is the frequency. Write the expression for frequency. f = c λ (2) Here, c is the speed of light with value 3 × 10 8 m s , and λ is the wavelength. Write the expression for power. P = Δ E Δ t (3) Here, P is the power dissipated, Δ E is the energy, and Δ t is the time period. Write the expression for number of photons. N = E E photon (4) Here, N is the number of photons and E photon is the energy of each photon. Write the expression for intensity and area. I = P A (5) Here, I is the intensity, P is the power, and A is ht area. Write the expression for area of the circle, A = π r 2 (6) Here, A is the area of the circle. r is the radius of the circle. Explanation: Combining equation (1) and (2), E photon = h c λ (7) Combining equation (5), (3) and (4), I = N E photon A Δ t Modifying the equation as follows. I = ( N Δ t ) × ( E photon A ) = ( N Δ t ) × ( h c λ A ) { ∵ E photon = h c λ } I = ( N Δ t ) × ( h c A λ ) For number of photons per second ( N Δ t ) , I = ( N Δ t ) × ( h c A λ ) ( N Δ t ) = I A λ h c (8) Area of the pupil is calculated as follows

4th Edition

ISBN: 9780134779218

Author: Knight

Publisher: PEARSON

See similar textbooks

Concept explainers

Particle Theory of Light

The particle theory of light was the proposal made by Newton in 1704 in his treatise Opticks. This is the most basic light theory, in which light is thought to be made up of microscopic particles known as "corpuscles" and that's why this particle theory …

Stopping Potential

In an experiment conducted by Heinrich Hertz, an apparatus was made where the incident light was made to fall on the metallic plate, it was discovered that metals emit electrons. The surface electrons are bound to metals with a minimum amount of energy a…

Quantization of Charges

An electron is a negatively charged subatomic particle either attached to an an atom or sticks to the nucleus of the atom. Electrons exert the negative charge that tries to balance the positive charge of the nucleus.

Question

Chapter 25, Problem 49P

To determine

The number of photons per second.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 25, Problem 48P

Chapter 25, Problem 50P

Students have asked these similar questions

In a scene from The Avengers (the first one) Black Widow is boosted directly upwards by Captain America, where she then grabs on to a Chitauri speeder that is 15.0 feet above her and hangs on. She is in the air for 1.04 s. A) With what initial velocity was Black Widow launched? 1 m = 3.28 ft B) What was Black Widow’s velocity just before she grabbed the speeder? Assume upwards is the positive direction.

In Dark Souls 3 you can kill the Ancient Wyvern by dropping on its head from above it. Let’s say you jump off the ledge with an initial velocity of 3.86 mph and spend 1.72 s in the air before hitting the wyvern’s head. Assume the gravity is the same as that of Earth and upwards is the positive direction. Also, 1 mile = 1609 m. A) How high up is the the ledge you jumped from as measured from the wyvern’s head? B) What is your velocity when you hit the wyvern?

A) If Yoshi flings himself downwards at 9.76 miles per hour to hit an enemy 10.5 m below him, how fast is Yoshi traveling when he hits the enemy? 1 mile = 1609 m

Chapter 25 Solutions

COLLEGE PHYSICS,AP EDITION >NASTA ED.<

Ch. 25 - Prob. 1CQ Ch. 25 - Prob. 2CQ Ch. 25 - Prob. 3CQ Ch. 25 - Prob. 4CQ Ch. 25 - Prob. 5CQ Ch. 25 - Prob. 6CQ Ch. 25 - The power lines that run through your neighborhood...Ch. 25 - The magnetic flux passing through a coil of wire...Ch. 25 - There is a counterclockwise induced current in the...Ch. 25 - Prob. 10CQ

Ch. 25 - The conducting loop in Figure Q25.11 is moving...Ch. 25 - Figure Q25.12 shows two concentric, conducting...Ch. 25 - Figure Q25.13 shows conducting loops next to each...Ch. 25 - Prob. 15CQ Ch. 25 - Prob. 16CQ Ch. 25 - Prob. 17CQ Ch. 25 - A metal wire is resting on a U-shaped conducting...Ch. 25 - Prob. 19CQ Ch. 25 - Prob. 20CQ Ch. 25 - Prob. 21CQ Ch. 25 - Prob. 22CQ Ch. 25 - Prob. 23CQ Ch. 25 - Prob. 24CQ Ch. 25 - Arc welding uses electric current to make an...Ch. 25 - A circular loop of wire has an area of 0.30 m2. It...Ch. 25 - In Figure Q25.27, a square loop is rotating in the...Ch. 25 - A diamond-shaped loop of wire is pulled at a...Ch. 25 - Figure Q25.29 shows a triangular loop of wire in a...Ch. 25 - A device called a flip coil can be used to measure...Ch. 25 - The electromagnetic waves that carry FM radio...Ch. 25 - The beam from a laser is focused with a lens,...Ch. 25 - A spacecraft in orbit around the moon measures its...Ch. 25 - A 6.0 mW vertically polarized laser beam passes...Ch. 25 - Prob. 36MCQ Ch. 25 - Prob. 1P Ch. 25 - Prob. 2P Ch. 25 - A l0-cm-long wire is pulled along a U-shaped...Ch. 25 - Figure P25.4 shows a 15-cm-long metal rod pulled...Ch. 25 - Prob. 5P Ch. 25 - In the rainy season, the Amazon flows fast and...Ch. 25 - A delivery truck with 2.8-m-high aluminum sides is...Ch. 25 - Prob. 8P Ch. 25 - Prob. 9P Ch. 25 - Prob. 10P Ch. 25 - Prob. 11P Ch. 25 - Prob. 12P Ch. 25 - Prob. 13P Ch. 25 - A magnet and a coil are oriented as shown in...Ch. 25 - A 1000-turn coil of wire 2.0 cm in diameter is in...Ch. 25 - Figure P25.I6 shows a 100-turn coil of wire of...Ch. 25 - Figure P25.17 shows a 10-cm-diameter loop in three...Ch. 25 - Prob. 18P Ch. 25 - Prob. 19P Ch. 25 - Prob. 20P Ch. 25 - Prob. 21P Ch. 25 - Prob. 22P Ch. 25 - Prob. 23P Ch. 25 - Prob. 24P Ch. 25 - Prob. 25P Ch. 25 - Prob. 26P Ch. 25 - A microwave oven operates at 2.4 GHz with an...Ch. 25 - The maximum allowed leakage of microwave radiation...Ch. 25 - Prob. 29P Ch. 25 - Prob. 30P Ch. 25 - At what distance from a 10 mW point source of...Ch. 25 - Prob. 32P Ch. 25 - A radio antenna broadcasts a 1.0 MHz radio wave...Ch. 25 - Prob. 34P Ch. 25 - The intensity of a polarized electromagnetic wave...Ch. 25 - Prob. 36P Ch. 25 - Prob. 37P Ch. 25 - Prob. 39P Ch. 25 - Prob. 40P Ch. 25 - Prob. 41P Ch. 25 - Prob. 42P Ch. 25 - One recent study has shown that x rays with a...Ch. 25 - Prob. 44P Ch. 25 - Prob. 45P Ch. 25 - Prob. 47P Ch. 25 - Prob. 48P Ch. 25 - Prob. 49P Ch. 25 - A particular species of copepod, a small marine...Ch. 25 - Prob. 51P Ch. 25 - Prob. 52P Ch. 25 - Prob. 53P Ch. 25 - Prob. 54P Ch. 25 - Prob. 55P Ch. 25 - A python can detect thermal radiation with...Ch. 25 - If astronomers look toward any point in outer...Ch. 25 - Prob. 58GP Ch. 25 - People immersed in strong unchanging magnetic...Ch. 25 - Prob. 60GP Ch. 25 - Prob. 61GP Ch. 25 - Prob. 62GP Ch. 25 - A 20-cm-long, zero-resistance wire is pulled...Ch. 25 - A TMS (transeranial magnetic stimulation) device...Ch. 25 - The 10-cm-wide, zero-resistance wire shown in...Ch. 25 - Experiments to study vision often need to track...Ch. 25 - A LASIK vision correction system uses a laser that...Ch. 25 - A new cordless phone emits 4.0 mW at 5.8 GHz. The...Ch. 25 - In reading the instruction manual that came with...Ch. 25 - Unpolarized light passes through a vertical...Ch. 25 - Prob. 72GP Ch. 25 - Prob. 73GP Ch. 25 - Prob. 74GP Ch. 25 - What is the wavelength of 27 MHz radio waves? A....Ch. 25 - If the frequency of the radio waves is increased,...Ch. 25 - Prob. 77MSPP Ch. 25 - The metal detector will not detect insulators...Ch. 25 - A metal detector can detect the presence of metal...Ch. 25 - Which of the following changes would not produce a...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

The number of photons per second.

Solution Summary: The author explains the formula used to determine the number of photons per second.

Concept explainers

The number of photons per second.

Want to see the full answer?

Chapter 25 Solutions