X-rays of a particular wavelength are used to irradiate sodium and copper surfaces in two separate experiments and stopping potentials are determined. The stopping potentials are

Question

X-rays of a particular wavelength are used to irradiate sodium and copper surfaces in two separate experiments and stopping potentials are determined. The stopping potentials are (A) Equal in both cases (B) Greater for sodium (C) Greater for copper (D) Infinite in both cases

Tardigrade Admin · Accepted Answer

The stopping potential is greater for sodium as it is easier to ionise sodium, than copper.

Q. X-rays of a particular wavelength are used to irradiate sodium and copper surfaces in two separate experiments and stopping potentials are determined. The stopping potentials are

Equal in both cases

Greater for sodium

Greater for copper

Infinite in both cases

The stopping potential is greater for sodium as it is easier to ionise sodium, than copper.