
The work function of a photoelectric material is 3.3 eV. It threshold frequency will be:
A)
B)
C)
D)
Answer
494.4k+ views
Hint
Threshold frequency is the minimum amount of the frequency of the radiation which is required to produce photoelectric effect. It is the ratio of the work function and Planck’s constant. As the value of the work function is given in eV first convert it into joule and then divide the Planck’s constant.
Complete Step by step solution
It is given that work function
First of all, convert the eV into joule by multiplying it with , we get
…………………….. (1)
As threshold frequency is the minimum frequency of radiation which is required for the photoelectric effect. It is the ratio of work function and Planck’s constant.
……………………….. (2)
Where, ϕ is the work function
is the threshold frequency
h is the Planck’s constant. Its value is
put the value of equation (1) and Planck’s constant in equation (2), we get
Hence this is the required threshold frequency for the photoelectric effect.
Thus, option (D) is correct.
Note
Here, it should be noticed that the work function is given in electron-volt but as Planck’s constant has unit joule-sec, therefore we must first the work function from electron-volt to Joule after that we solve the problem otherwise, we will get the wrong results.
Threshold frequency is the minimum amount of the frequency of the radiation which is required to produce photoelectric effect. It is the ratio of the work function and Planck’s constant. As the value of the work function is given in eV first convert it into joule and then divide the Planck’s constant.
Complete Step by step solution
It is given that work function
First of all, convert the eV into joule by multiplying it with , we get
As threshold frequency is the minimum frequency of radiation which is required for the photoelectric effect. It is the ratio of work function and Planck’s constant.
Where, ϕ is the work function
h is the Planck’s constant. Its value is
put the value of equation (1) and Planck’s constant in equation (2), we get
Hence this is the required threshold frequency for the photoelectric effect.
Thus, option (D) is correct.
Note
Here, it should be noticed that the work function is given in electron-volt but as Planck’s constant has unit joule-sec, therefore we must first the work function from electron-volt to Joule after that we solve the problem otherwise, we will get the wrong results.
Recently Updated Pages
Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 English: Engaging Questions & Answers for Success

Master Class 11 Computer Science: Engaging Questions & Answers for Success

Master Class 11 Maths: Engaging Questions & Answers for Success

Trending doubts
State and prove Bernoullis theorem class 11 physics CBSE

What are Quantum numbers Explain the quantum number class 11 chemistry CBSE

Write the differences between monocot plants and dicot class 11 biology CBSE

Who built the Grand Trunk Road AChandragupta Maurya class 11 social science CBSE

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

State the laws of reflection of light
