1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bond [772]
3 years ago
13

What is the longest wavelength of light that will emit electrons from a metal whose work function is?

Physics
1 answer:
alexdok [17]3 years ago
6 0
 Best Answer:<span>  </span><span>hf = work function + KE 
However if you are looking at the max wavelength (or threshold frequency) then there will only be just enough energy for the photoelectrons to be liberated, hence their KE will be 0. 
So hf = work function 
convert eV to joules, 2.4 x (1.6 x 10^-19) = 3.84 x 10^-19 
therefore, hf = 3.84 x 10^-19 
f = 3.84 x 10^-19 / planck's constant which is 6.63 x 10^-34 
f = 5.79 x 10^14 Hz 
c = frequency x wavelength, 
wavelength = speed of light/frequency 
= (3x10^8)/(5.79x10^14) 
=5.18 x 10^-7 metres</span>
You might be interested in
What is an isotope ?
Step2247 [10]

<span>An isotope is a form of a chemical element whose atomic nucleus contains a specific number of neutrons in addition to the number of protons that distinctively defines the element. The nuclei of most atoms have neutrons as well as protons.</span>

8 0
3 years ago
Where are the longest continuous mountain ranges on Earth located?
andrew-mc [135]
It is located through seven countries in South America which are Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile and Argentina. This is the Andes Mountains which is about 7000 km long. This is known as the world's longest mountain range.
6 0
3 years ago
Multiple choice 1. which of earth's spheres contains mountains, valleys, and other landscapes? (1 point
ycow [4]
Here are the answers:
1. Geosphere (though the term lithosphere is mostly used)
2. Both ice and wind (glaciers, and really strong winds)
3. Water
4. Its inertia (the Earth is constantly "falling" towards the Sun due to its gravitational pull, but its inertia helps the Earth from maintaining its orbit.)
5. The rotating Earth
6. one year
7. The equator
8. It depends on how much of the sunlit side of the Moon faces the Earth
9. When an object in space comes between the Sun and a third object
10. D<span>ifferences in how much the Moon and the Sun pull on different parts of Earth 
11. b. False
12. a. True

Hope my answers have come to your help.</span>
4 0
3 years ago
The movement of electricity is called?
stira [4]
It's commonly referred to as an electric current.
5 0
3 years ago
The wavelength of light is given by the velocity divided by the frequency. the velocity of blue light is 300,000,000 m/sec, and
s2008m [1.1K]
<span>Electromagnetic radiation are represented in waves. Each type of wave has a certain shape and length. The distance between two peaks in a wave is called the wavelength. It is indirectly related to the frequency which is the number of wave that pass per unit of time. Wavelength is equal to the speed of light divided by the frequency. We calculate as follows:

Wavelength = </span>300,000,000 m/sec / <span>650,000,000,000,000 per second
Wavelength = 4.62x10^-4 m</span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • An operation has a 20 percent scrap rate. As a result, 80 pieces per hour are produced. What is the potential labor productivity
    8·1 answer
  • What conclusion does the student most likely make based
    6·2 answers
  • If two billiard balls collide, what happens to the systems overall momentum ?
    5·1 answer
  • Which statements about acceleration are true?
    7·2 answers
  • An astronaut weighs 700 N on Earth what is the astronaut's Mass on Earth?
    11·1 answer
  • Direct current is the flow of an electric charge?
    11·1 answer
  • 10.
    14·1 answer
  • Breanna is standing beside a merry-go-round pushing 19° from the tangential direction and is able to accelerate the ride and her
    11·1 answer
  • The triceps muscle in the back of the upper arm is primarily used to extend the forearm. Suppose this muscle in a professional b
    13·1 answer
  • What's the difference between the speed and velocity of an object?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!