1. • Response of the eye. The human eye is most sensitive to BIO green light of wavelength 505 nm. Experiments have found that when people are kept in a dark room until their eyes adapt to the darkness, a single photon of green light will trigger receptor cells in the rods of the retina. (a) What is the fre- quency of this photon? (b) How much energy (in joules and eV) does it deliver to the receptor cells? (c) To appreciate what a small amount of energy this is, calculate how fast a typical bacterium of mass 9.5 x 10-12g would move if it had that much energy.

1. • Response of the eye. The human eye is most sensitive to BIO green light of wavelength 505 nm. Experiments have found that when people are kept in a dark room until their eyes adapt to the darkness, a single photon of green light will trigger receptor cells in the rods of the retina. (a) What is the fre- quency of this photon? (b) How much energy (in joules and eV) does it deliver to the receptor cells? (c) To appreciate what a small amount of energy this is, calculate how fast a typical bacterium of mass 9.5 x 10-12g would move if it had that much energy.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: X ray intensity e) Looking at the graph below for a monoenergetic X-ray X-ray intensity 250 200 150…

A: i. What is meant by half-value thickness?Based on the provided graph, the half-value thickness (HVT)…

Q: 46. * BIO EST Fireflies Fireflies emit light of wavelengths from 510 nm to 670 nm. They are about…

A: Detailed explanation:In this problem, we want to determine the number of ATP molecules required for…

Q: -Which of the following are consistent with the wave-like behavior of light? .Line Spectra •…

Q: The photoreceptors in the human eye, called rods and cones, have different sensitivities to…

A: Given Graph of wavelength and log relative sensitivity of rods and cones

Q: Max Planck proposed his constant h to relate the energy of a photon to its frequency. Calculate the…

Q: Itravió- Ultraviolet radiation. There are two categories of ultravio- let light. Ultraviolet A (UVA)…

A: Given: wavelength range of UVA λA=(320-400) nm wavelength range of UVB λB=(280 - 320 ) nm

Q: 4B. If a beam of red light and a beam of green light have exactly the same energy, a) Determine…

A: Imagine you have two carts, one small and one large. You can fill the carts with boxes of varying…

Q: 7. Consider the following arrangement of identical light bulbs in a circuit. А C D E a) What are the…

A: A. A and B are in parallel so they both will have same potential difference and same brightness.…

Q: 1-Which of the following are consistent with the wave-like behavior of light? .Line Spectra •…

A: 1. Which of the following are consistent with the wave-like behavior of light? . Line Spectra .…

Q: 28. * BIO Human vision sensitivity To see an object with the unaided eye, the light intensity coming…

A: Approach to solving the question:Please see attached photos for detailed solutions. Thank you.…

Q: 8 A certain laser outputs pure red light (photon energy 1.8 eV) with power 700 mW (0.7 W). How many…

A: 1 eV = 1.6 × 10-19 J Power = 0.7 W

Q: 3. In a TV tube an electric potential difference accelerates electrons from a rest position towards…

Q: A 568 nm laser emits 1.33 x 1019 photons per second, how much total energy (in J) would this…

A: Have a look dear

Q: 4. Calculate the photon energy and momentum for each of the following. (a) FM radio with a frequency…

A: Given Data:Frequency Wavelength of red light Wavelength of X-ray To Determine:(a). The photon energy…

Q: 23. Electromagnetic radiation of an unknown wavelength knocks electrons out of a Copper cath- ode of…

A: Given, the work function of Copper cathode, φ=4.70 eV Stopping potential, Vs= 3.62 eV

Q: Find the magnitude of the net electric force on the 2 nC charge. The Coulomb constant is 8.98755 x…

Q: 19. True or False: Maximum Kinetic Energy of emitted electrons is independent of frequency and…

Q: •53 A helium-neon laser emits laser light at a wavelength of 632.8 nm and a power of 2.3 mW. At what…

A: Given: The wavelenght of the photon is 632.8 nm. The power is 2.3 mW.

Q: Photon Energies and the Electromagnetic Spectrum• Explain the relationship between the energy of a…

A: a) Energy of the photon (in joules) is given as,

Concept explainers

de Broglie Equation

The sketch of matter waves is drawn below:

Question

1. • Response of the eye. The human eye is most sensitive to
BIO green light of wavelength 505 nm. Experiments have found
that when people are kept in a dark room until their eyes adapt
to the darkness, a single photon of green light will trigger
receptor cells in the rods of the retina. (a) What is the fre-
quency of this photon? (b) How much energy (in joules and
eV) does it deliver to the receptor cells? (c) To appreciate what
a small amount of energy this is, calculate how fast a typical
bacterium of mass 9.5 x 10-12 g would move if it had that
much energy.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

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.

Similar questions

52. • Structure of a virus. To investigate the structure of BIO extremely small objects, such as viruses, the wavelength of the probing wave should be about one-tenth the size of the object for sharp images. But as the wavelength gets shorter, the energy of a photon of light gets greater and could damage or destroy the object being studied. One alternative is to use elec- tron matter waves instead of light. Viruses vary considerably in size, but 50 nm is not unusual. Suppose you want to study such a virus, using a wave of wavelength 5.00 nm. (a) If you use light of this wavelength, what would be the energy (in eV) of a single photon? (b) If you use an electron of this wavelength, what would be its kinetic energy (in eV)? Is it now clear why matter waves (such as in the electron microscope) are often preferable to electromagnetic waves for studying microscopic objects?
НА • Two copper nanowires are insulated by a copper oxide nano-layer that provides a 10.0- eV potential barrier. Estimate the tunnelling probability between the nanowires by 7.00-eV electrons through a 5.00-nm thick oxide layer. What if the thickness of the layer were reduced to just 1.00 nm? What if the energy of electrons were increased to 9.00 eV? ess Page T 17 System properties 6. EN - ) I hp
3. • A laser used to weld detached retinas emits light with a BIO wavelength of 652 nm in pulses that are 20.0 ms in duration. The average power expended during each pulse is 0.600 W. (a) How much energy is in each pulse, in joules? In electron volts? (b) What is the energy of one photon in joules? In elec- tron volts? (c) How many photons are in each pulse?
A photon of light has a frequency of 5.00 x 1014 Hz. If the frequency of the photon was doubled then which of these would happen to the energy of this photon? a. it would become one-fourth as much b. it would become half as much c. it would double d. it would quadruple e. it would triple
2. When light with a wavelength of 218 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic energy of 3.28 x 10 J. Determine the wavelength of light that should be used to quadruple the maximum kinetic -19 energy of the electrons ejected from this surface. X 173.7 nm