Question

Look carefully at the diagrams of each wave.

Answer 1

 wave b has the shortest wave length

Answer 2

Answer : Wave B.

Explanation :

Given that, the waves A, B, C, and D each represent a different wave of the electromagnetic spectrum.  

The energy of a wave is given by :

$E=\dfrac{hc}{\lambda}$

Where,

h is the Planck constant

c is the speed of the light

$\lambda$ is the wavelength of light.

The wavelength of a wave is defined as the distance between two consecutive crests or troughs.

The energy of the wave is inversely proportional to its wavelength.

So, the wave that is energetic enough to damage  living human cells is wave B because its wavelength is small as compared to other waves.

Hence, the correct option is (B) " Wave B because it has the shortest wavelength, and therefore carries the most energy ".