The Vijayawada $FM$ radio station broadcasts at a frequency of $103.4 \ MHz$. The wavelength of the corresponding radio waves (in $m$) is

Explain the production,characteristics,and uses of $X$-rays.

Which of the following is not an electromagnetic radiation?

The value of one Einstein for radiation of wavelength $9000 \ \mathring{A}$ is .............

The work functions $(W_0)$ of $K, Na, Li, Mg$ and $Cu$ are $2.25, 2.30, 2.42, 3.70$ and $4.80 \ eV$ respectively. How many of these metals do not undergo photoelectric effect when a radiation of wavelength $450 \ nm$ is allowed to fall on them? $(1 \ eV = 1.602 \times 10^{-19} \ J)$

Splitting of spectral lines when atoms are subjected to a strong electric field is called: