Based on your knowledge of the electromagnetic spectrum, why are radio waves considered harmless while ultraviolet waves and x-rays considered harmful?
a) radio waves have longer wavelengths, lower frequency, and lower energy than ultraviolet waves and x-rays.
b) lower energy and higher frequency ultraviolet waves and x-rays is enough to break bonds and damage cells.
c) high frequency and energy of radio waves mean that they penetrate much farther through matter than uv or x-rays.
d) the energy of the lower frequency ultraviolet waves and x-rays is high enough to be considered ionizing radiation.

The correct answer of this question is : A) Radio waves have longer wavelengths, lower frequency, and lower energy than ultraviolet waves and x-rays.

EXPLANATION :

Before going to answer this question, first we have to know the electromagnetic spectrum.

Electromagnetic spectrum is the arrangement of electromagnetic waves in the ascending order of frequency or descending order of wavelength.

When the waves are arranged in the ascending order of their frequency, then perfect order is given below as such -

Radio wave < Micro wave <  Infrared wave <   Visible light < U.V ray<  X-ray < Gamma ray .

Hence, we see that radio wave has the least frequency, and gamma ray has the most frequency.

We know that wavelength and frequency are inversely are inversely proportional to each other. Hence, radio wave has more wavelength and less frequency.

The wave having more frequency is more energetic. Hence, gamma is more energetic and radio wave is less energetic .

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

b) phosphorus pentoxide