Electromagnetic Spectrum — Prelims Questions

Which of the following electromagnetic waves has the shortest wavelength?

An electromagnetic wave has a frequency of $6 \times 10^{14}\,\text{Hz}$. To which part of the electromagnetic spectrum does this wave belong? (Given: Speed of light $c = 3 \times 10^8\,\text{m/s}$)

Which of the following applications is NOT associated with microwaves?

If the energy of a photon is $3.313 \times 10^{-19}\,\text{J}$, what is its frequency? (Given: Planck's constant $h = 6.626 \times 10^{-34}\,\text{J\cdot s}$)

Which of the following statements about electromagnetic waves is INCORRECT?

Which type of electromagnetic radiation is used for detecting flaws in metal castings and for treating certain types of cancer?