/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q7DQ Human skin is relatively insensi... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 6: Q7DQ (page 1275)

Human skin is relatively insensitive to visible light, but ultraviolet radiation can cause severe burns. Does this have anything to do with photon energies? Explain.

Short Answer

Expert verified

The UV radiation has higher frequency than the threshold frequency of human skin thus the striking of UV light will definitely cause sever burns.

Step by step solution

01

(a) Concept of photoelectric effect.

The photoelectric effect is the ejection of surface electrons in a metal when photon strikes. The mathematical expression governing the effect and giving the maximum kinetic energy of the ejected electrons is,

K.Emax=hf-桅eV0=hf-hf0

Where 桅the work function, hf is the energy of the striking photon, f0 is the threshold frequency and V0 is the stopping potential.

02

(b) Explanation of the argument.

The photons have high energy in ultraviolet radiations and high energy means higher frequency than the threshold frequency. So, the striking light has frequencies greater-than the work function of the human skin which will eventually ionize the skin cells. Therefore, the human skin will show chemical effects and will burn.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

As you pilot your space utility vehicle at a constant speed toward the moon, a race pilot flies past you in her space racer at a constant speed of 0.800c relative to you. At the instant the space racer passes you, both of you start timers at zero. (a) At the instant when you measure that the space racer has travelled1.2脳108m past you, what does the race pilot read on her timer? (b) When the race pilot reads the value calculated in part (a) on her timer, what does she measure to be your distance from her? (c) At the instant when the race pilot reads the value calculated in part (a) on her timer, what do you read on yours?

Determine the electric charge, baryon number, strangeness quantum number, and charm quantum number for the following quark combinations: (a) uds; (b) cu炉(c) ddd; and (d)dc炉 Explain your reasoning.

A high-speed train passes a train platform. Larry is a passenger on the train, Adam is standing on the train platform, and David is riding a bicycle toward the platform in the same direction as the train is traveling. Compare the length of a train car as measured by Larry, Adam, and David.

The theory of relativity sets an upper limit on the speed that a particle can have. Are there also limits on the energy and momentum of a particle? Explain.

A 4.78 - MeV alpha particle from aR226a decay makes a head-on collision with a uranium nucleus. A uranium nucleus has 92 protons. (a) What is the distance of closest approach of the alpha particle to the center of the nucleus? Assume that the uranium nucleus remains at rest and that the approach is much greater than the radius of the uranium nucleus. (b) What is the force on the alpha particle at the instant when it is at the distance of closest approach?

See all solutions

Recommended explanations on Physics Textbooks

Physics of Motion

Read Explanation

Fundamentals of Physics

Read Explanation

Electricity and Magnetism

Read Explanation

Circular Motion and Gravitation

Read Explanation

Thermodynamics

Read Explanation

Turning Points in Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.