Explain the reason for the formation of a spectrum.

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

Electromagnetic radiation with maximum wavelength is

Which of the following statements is $NOT$ true?

When radiation of $300 \ nm$ is shone on five metals,namely $Li, Mg, Ag, Cu,$ and $K$,the number of metals that show the photoelectric effect is:

Which characteristics of electromagnetic radiation can be explained by its wave nature and particle nature,respectively?