Advertisements
Advertisements
Question
State how will you use this graph to detennine the value of Planck's constant.
Advertisements
Solution
From the graph the slope , tan θ = `(V_s)/f`
⇒ tan `theta =h/e [∵V_s =h/ef]`
∴ h = Planck's constant = e tan θ
Thus, knowing the slope we can get the value of 'h' - Planck's constant
APPEARS IN
RELATED QUESTIONS
The photoelectric current in a photoelectric cell can be reduced to zero by a stopping potential of 1.8 volt. Monochromatic light of wavelength 2200Å is incident on the cathode. Find the maximum kinetic energy of the photoelectrons in joules. [Charge on electron = 1.6 x 10-19 C]
Draw a neat labelled circuit diagram of experimental arrangement for study of photoelectric effect.
Use Einstein's photoelectric equation to explain the observations from this graph ?
A beam of monochromatic radiation is incident on a photosensitive surface. Answer the following question giving reason :
Does the kinetic energy of the emitted electrons depend on the intensity of incident radiation?
In photoelectric effect, why should the photoelectric current increase as the intensity of monochromatic radiation incident on a photosensitive surface is increased? Explain.
What is photoelectri effect ? Defin (i) Stopping potential (ii) Photoelectric work function.
With reference to the photoelectric effect, what is meant by threshold wavelength?
If the frequency of the incident radiation is increased from 4 × 1015 Hz to 8 × 1015 Hz, by how much will the stopping potential for a given photosensitive surface go up?
Photoelectric effect is possible ______.
The phenomenon of photoelectric emission was observed by ______.
