This topic contains a solution. Click here to go to the answer

Author Question: Blue light (l = 460 nm) is incident on a piece of potassium (W = 2.45 eV). What is the maximum ... (Read 40 times)

Yi-Chen

  • Hero Member
  • *****
  • Posts: 550
Blue light (l = 460 nm) is incident on a piece of potassium (W = 2.45 eV). What is the maximum kinetic energy of the ejected photoelectrons? (h = 6.63  10-34 Js, c = 3.00  108 m/s, 1 eV = 1.60  10-19 J, and 1 nm = 10-9 m)
 a. 1.0 eV
  c. 0.50 eV
  b. 0.25 eV
  d. 4.9 eV

Question 2

What is the energy of a photon whose frequency is 7.9  1020 Hz? (h = 6.63  10-34 Js and 1 eV = 1.60  10-19 J)
 a. 5.0 MeV
  c. 1.6 MeV
  b. 3.3 MeV
  d. 2.5 MeV



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sarahccccc

  • Sr. Member
  • ****
  • Posts: 318
Answer to Question 1

B

Answer to Question 2

B




sarahccccc

  • Sr. Member
  • ****
  • Posts: 318

 

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

For a complete list of videos, visit our video library