Question

The sterilization of hospital rooms is done by .......... range of UV rays.
A) \[100 - 2000{A^0}\]
B) $2600 - 2700{A^0}$
C) $3000 - 4000{A^0}$
D) None of the above

Answer 1

Hint: Ultraviolet is one of the electromagnetic radiation which is produced by the Sun and distributed either as waves or as particles of specific frequency and wavelength. Few features of UV rays are its wavelength is narrower than visible light, thick clouds can block UV radiation and in clinics and laboratories a UV light can be used as a disinfectant.

Complete answer:
Ultraviolet sterilization is a disinfection method using UV light in the wavelength range $2600 - 2700{A^0}$ in order to kill or inactivate microorganisms by breaking the molecular bonds within DNA, thereby leading to the formation of thymine dimers which disrupts the DNA. In case the UV light is exposed for longer periods of time then more thymine dimers will be formed in the DNA. The risk of getting an incorrect repair is also high. In case it happens the cell cannot continue its actual work. Depending on the site of damage cells are being created from healthy cells otherwise the cells will die if it undergoes widespread damage. Thus they are unable to perform vital cellular functions.
Thus we can say that the correct answer is option B which is $2600 - 2700{A^0}$.

Additional information:
In clinical settings UV treatment can be used for treating psoriasis and also for other dermatological conditions. It is used as an occasional component in chronic open wounds.

Note:
The various uses of UV rays are that it can be used for sterilizing surgical equipment in hospitals, UV lamps can emit light which is sufficient to destroy the germs, and Ultraviolet light is also used for water treatment and in the pharmaceutical sector.