Light of wavelength $1 \,nm$ belongs to the following class of waves:

Which of the following has the minimum wavelength?

The magnetic field in a plane electromagnetic wave is given by $B = 2 \times 10^{-7} \sin(0.5 \times 10^3 x + 1.5 \times 10^{11} t)$. This electromagnetic wave is .........

Which of the following statements is wrong?

The waves having maximum wavelength among the following electromagnetic waves is

Write the source of radio waves,their types,and uses.