Grade 12Modern Physics

The threshold wavelength of tungsten is 2300 angstroms. If ultra violet light of wavelength 1800 angstroms is incident on it,then what would be the maximum kinetic energy of photoelectrons?

Shreyas patil

7 Years agoGrade 12

1 Answer

Arun

7 Years ago

wavelength(λ) of UV light= 188 nm
Energy of incident rays = hc/λ (h=planks constant,c=speed of light) =1242 eV-nm/188 nm=6.606 eV
Threshold λ=230 nm
Threshold energy=work function ( Φ )=1242eV-nm/230 nm= 5.4 eV.
By einstein photo-electric effect,

Energy Incident=Φ + Maximum K.E.

Thus maximum kinetic energy of emitted electrons would be=6.606 - 5.4 = 1.206 eV.

RegaRds

Arun

A particle is projected in vertical plane such that after 5 seconds its velocity becomes horizontal. The maximum height attained by the projectile from point of projection is n3 m. The value of n is _______. (g = 10 m/s2)

modern physics

1 Answer Available

Last Activity: 3 Years ago

Two particles approach each other from very large distance as shown, . if the least separation between the particles is b, what is the speed of M in center of mass frame when particles are closest? (gravity negligible)

modern physics

1 Answer Available

Last Activity: 4 Years ago

Can the sum of two equal vectors be equal to either vector

modern physics

1 Answer Available

Last Activity: 4 Years ago

A nucleus X¹⁸⁴ at rest emitt alpha particle With kinetic energy 9.0MeV. The product Nucleus is Y. The values of Binding energy per nucleon of alpha particle & Y differ by 1.5MeV. The values of Binding energy per nucleon of X & Y differ by (n÷230) MeV, then n is

modern physics

1 Answer Available

Last Activity: 4 Years ago

SUBJECT: PROBLEM BASED ON LINE DETECTION.
Query: How to apply all the filters for line detection on the following piece of image (provided below)? Explain its Observations to comment on its results.

modern physics

1 Answer Available

Last Activity: 4 Years ago

View all Questions

The threshold wavelength of tungsten is 2300 angstroms. If ultra violet light of wavelength 1800 angstroms is incident on it,then what would be the maximum kinetic energy of photoelectrons?

Shreyas patil

1 Answer

Arun

Other Related Questions on modern physics

A particle is projected in vertical plane such that after 5 seconds its velocity becomes horizontal. The maximum height attained by the projectile from point of projection is n3 m. The value of n is _______. (g = 10 m/s2)

Two particles approach each other from very large distance as shown, . if the least separation between the particles is b, what is the speed of M in center of mass frame when particles are closest? (gravity negligible)

Can the sum of two equal vectors be equal to either vector

A nucleus X184 at rest emitt alpha particle With kinetic energy 9.0MeV. The product Nucleus is Y. The values of Binding energy per nucleon of alpha particle & Y differ by 1.5MeV. The values of Binding energy per nucleon of X & Y differ by (n÷230) MeV, then n is

SUBJECT: PROBLEM BASED ON LINE DETECTION.Query: How to apply all the filters for line detection on the following piece of image (provided below)? Explain its Observations to comment on its results.

A nucleus X¹⁸⁴ at rest emitt alpha particle With kinetic energy 9.0MeV. The product Nucleus is Y. The values of Binding energy per nucleon of alpha particle & Y differ by 1.5MeV. The values of Binding energy per nucleon of X & Y differ by (n÷230) MeV, then n is

SUBJECT: PROBLEM BASED ON LINE DETECTION.
Query: How to apply all the filters for line detection on the following piece of image (provided below)? Explain its Observations to comment on its results.