Chapter 38: Q 6 (page 1113)

Metal 1 has a larger work function than metal 2. Both are illuminated with the same short-wavelength ultraviolet light. Do photoelectrons from metal 1 have a higher speed, a lower speed, or the same speed as photoelectrons from metal 2? Explain.

Short Answer

Expert verified

Photoelectrons from metal 1 will have a lower speed than metal 2.

Step by step solution

Step 1. Two metals 1 and 2 are illuminated with same short wavelength and :Work function of metal 1 > Work function of metal 2

We need to find out whether photoelectrons of metal 1 will have higher, lower or equal speed to that to photoelectrons of metal 2.

Step 2. Comparing the speed of metal 1 and metal 2.

$S i n c e λ_{1} = λ_{2} f_{1} = f_{2} A n d {(E_{e l e c})}_{1} = h f_{1} i s e q u a l t o {(E_{e l e c})}_{2} = h f_{2} B u t {(E_{0})}_{1} = {(E_{0})}_{2} T h e r e f o r e, {(K_{m a x})}_{1} = E_{e l e c} - {(E_{0})}_{1} {(K_{m a x})}_{2} = E_{e l e c} - {(E_{0})}_{2} S o, {(K_{m a x})}_{1} {< (K_{m a x})}_{2} H e n c e, v_{1} < v_{2}$

Photoelectrons from metal 1 will have a lower speed than metal 2.

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.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Physics Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Metal 1 has a larger work function than metal 2. Both are illuminated with the same short-wavelength ultraviolet light. Do photoelectrons from metal 1 have a higher speed, a lower speed, or the same speed as photoelectrons from metal 2? Explain.

Short Answer

Step by step solution

Step 1. Two metals 1 and 2 are illuminated with same short wavelength and :Work function of metal 1 > Work function of metal 2

Step 2. Comparing the speed of metal 1 and metal 2.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Space Physics

Quantum Physics

Radiation

Electric Charge Field and Potential

Engineering Physics

Energy Physics

Study anywhere. Anytime. Across all devices.