In Davisson-German experiment, observed value of de-Broglie’s wavelength is 0.165 $n m$ whereas theoretical value is 0.166 $n m$ . Choose the correct reason for lower experimental value.

Error in observation of angle at which maxima of intensity of diffracted electron occurs.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Temperature of nickel crystal is more than the ambient temperature

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Electron speed inside the crystal is more than $\sqrt{(\frac{2 q V}{m})}$ and no account is made to calculate this increase of speed.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Electron behave like waves in this experiment.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
Electron speed inside the crystal is more than $\sqrt{(\frac{2 q V}{m})}$ and no account is made to calculate this increase of speed.

When an incident electron enters the metal surface, its kinetic energy increases by an amount equals to work function of metal and hence, its speed increases. No account of this increase in speed is made.

Suggest Corrections

Similar questions

In Davisson-German experiment, observed value of de-Broglie’s wavelength is 0.165 $n m$ whereas theoretical value is 0.166 $n m$ . Choose the correct reason for lower experimental value.

Q. The experiment value for the molar mass of a non-volatile solute is twice the theoretic value. What is Vant Hoff factor for the solute?

Q. In Davisson-Germer experiment, as shown below, where electrons are reflected from a crystal plane.

If at angle

i

, the peak diffraction is observed, the de Broglie wavelength of electrons can be calculated by

In an experiment with vibration magneto-meter the value of $4 π^{2} \frac{I}{T^{2}}$ for a short bar magnet is observed as $36 \times 10^{- 4}$ . In the experiment with deflection magnetometer with the same magnet the value of $\frac{4 π d^{3}}{2 μ_{0}}$ is observed as $\frac{10^{8}}{36}$ . The magnetic moment of the magnet used is :

Q. In experiment of Davisson-Germer, emitted electron from filament is accelerated throguh voltage

V

then de-Broglie wavelength of that electron will be ________ m .

Join BYJU'S Learning Program

In Davisson-German experiment, observed value of de-Broglie’s wavelength is 0.165 nm whereas theoretical value is 0.166 nm. Choose the correct reason for lower experimental value.

In Davisson-German experiment, observed value of de-Broglie’s wavelength is 0.165 $n m$ whereas theoretical value is 0.166 $n m$ . Choose the correct reason for lower experimental value.