Question

Choose one type of electromagnetic radiations, specify the range of wavelengths for this type and give one application in our everyday lives and explain it (Minimum five lines) ؟

Answer 1

Radiation type: X ray radiation

Wavelength range: 10 pm to 10 nm

Application: X ray is greately used in the medical purpose. It is used to make photographs of broken bones. Not only it is used as a cancer detector , but it can also destroy the cancer cells by radiation therapy.  Most applications of X rays are based on their ability to pass through matter. This ability varies with different substances; e.g., wood and flesh are easily penetrated, but denser substances such as lead and bone are more opaque. The penetrating power of X rays also depends on their energy. The more penetrating X rays, known as hard X rays, are of higher frequency and are thus more energetic, while the less penetrating X rays, called soft X rays, have lower energies. X rays that have passed through a body provide a visual image of its interior structure when they strike a photographic plate or a fluorescent screen; the darkness of the shadows produced on the plate or screen depends on the relative opacity of different parts of the body.

Photographs made with X rays are known as radiographs or skiagraphs. Radiography has applications in both medicine and industry, where it is valuable for diagnosis and nondestructive testing of products for defects.