Question

Platinum which is widely used in electronics, medicine, and as a catalyst has awork function (the...

Platinum which is widely used in electronics, medicine, and as a catalyst has awork function (the minimum energy needed to eject an electron from the metal surface) of 9.05 x 10-19J. What is the longest wavelength of light that will cause electrons to be emitted?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

# longest wavelength of light that will cause electrons to be emitted is nothing but thresold frequency.

Therefor frequency ( ) = work function (W)

# According to planck's law we can relate energy with wave length ( ) as shown in the picture.

# Finally wavelength is 220.86 nm.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A) Light of frequency 9.13 x 10^14 s-1 shines on the surface of a certain metal,...
A) Light of frequency 9.13 x 10^14 s-1 shines on the surface of a certain metal, Metal X. if the ejected electrons have a velocity of 6.13x10^5 m/s, what is the work function (binding energy) of Metal X? B) What is the longest wavelength of light (in nm) that can be used to eject electrons from the surface of Metal X? C) A different metal, Metal Y, has smaller binding energy. If the same frequency of light from Part A...
A certain metal has a work function of 2.6 eV. (a) What is the shortest wavelength...
A certain metal has a work function of 2.6 eV. (a) What is the shortest wavelength of the electromagnetic radiation that will eject electrons from this material? (b) If light of wavelength 420 nm is used, what will be the speed of the emitted electrons?
Steel and iron are often "galvanized" or coated with a thin layer of zinc metal to...
Steel and iron are often "galvanized" or coated with a thin layer of zinc metal to prevent corrosion (iron rusts but zinc does not). What is the longest wavelength of light (in nm) that can eject electron from zinc metal? (i.e. assume the electrons kinetic energy is very close to zero.) The work function of zinc = 4.3 eV and 1 electron- volt (eV) = 1.602 x 10 ^ -19 J.
While studying the photoelectric effect, a chemist finds that light with the frequency of 5.6 x...
While studying the photoelectric effect, a chemist finds that light with the frequency of 5.6 x 10(14) Hz is insufficient to eject electrons from a metal surface. Which of the following might the chemist reasonably try if the goal is to eject electrons? a. using light with frequency of 4.6 x 10(14) Hz b. using light with frequency of 6.6 x 10(14) Hz c. increasing the amplitude of the radiant light d. decreasing the amplitude of the radiant light What...
a) A photon of wavelength 43 nm is incident upon a metal in a photoelectric apparatus....
a) A photon of wavelength 43 nm is incident upon a metal in a photoelectric apparatus. A stopping voltage of 21 V was obtained. What is the threshold frequency of the metal? (format of a.b x 10cdHz) b) Light with a frequency of 5.00 x 1014 Hz illuminates a photoelectric surface that has a work function of 2.10 x 10-19 J. What is the maximum kinetic energy of the emitted photoelectrons? (format of a.bc x 10-de J ) c) Light...
23.   Photons and Energy      A. A certain source emits radiation of wavelength 500.0 nm. Determine...
23.   Photons and Energy      A. A certain source emits radiation of wavelength 500.0 nm. Determine its frequency. Calculate the energy associated with this photon at 500.0 nm.    B. If it takes 3.36 x 10-19 J of energy to eject an electron from the surface of a certain metal, Calculate the frequency of this energy and the longest possible wavelength in nm.       C. Ionization energy is the energy required to remove an electron from an atom in...
A metal alloy has a work function of E0 = 4.2 × 10?19 J. It is...
A metal alloy has a work function of E0 = 4.2 × 10?19 J. It is irradiated with light of different wavelengths, and the maximum kinetic energy of ejected electrons is measured. Part A: What is the maximum kinetic energy of ejected electron when 390-nm light is used? Part B:vWhat is the maximum electron speed when 390-nm light is used? Part C: Does 750-nm light have enough energy to eject an electron from the metal?
Steel and iron are often 'galvanized', or coated with a thin layer of zinc metal to...
Steel and iron are often 'galvanized', or coated with a thin layer of zinc metal to prevent corrosion (iron rusts but zinc does not). What is the longest wavelength of light (in nm) that can eject electrons from zinc metal? (i.e. assume the electron's kinetic energy is very close to zero.) The work function of zinc = 4.3 eV and 1 electron-volt (eV) = 1.602*10^-19 J.
a) A photoelectric surface has a work function of 3.30 x 10-19 J. What is the...
a) A photoelectric surface has a work function of 3.30 x 10-19 J. What is the threshold frequency of this surface? (format of a.bc x 10de Hz) b) What is the stopping voltage of an electron that has 5.40 x 10-19 J of kinetic energy? (3 digit answer) c) A photoelectric surface requires a light of maximum wavelength of 675 nm to cause electron emission. What is the work function (in eV) of this surface? (3 digit answer) d) A...
Light that has a 192 nm wavelength strikes a metal surface, and photoelectrons are produced moving...
Light that has a 192 nm wavelength strikes a metal surface, and photoelectrons are produced moving as fast as 0.002c. 1) What is the work function of the metal? (Express your answer to three significant figures.) ×10^−19J 2) What is the threshold wavelength for the metal above which no photoelectrons will be emitted? (Express your answer to three significant figures.) nm
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT