RESEARCH METHODOLOGY

Detailed explanation-1: -Bacterial growth may be affected by temperature. Temperature is independent and bacterial growth is dependent. If the temperature changes then it will affect bacterial growth.

Detailed explanation-2: -Culture-based investigations of a small number of bacterial taxa have indicated that exposure to light, and especially ultraviolet (UV) wavelengths [16, 22–25], can inactivate many microorganisms and therefore potentially reduce dust microbial community viability.

Detailed explanation-3: -In dark rooms, about 12 percent of bacteria, on average, were able to reproduce, the researchers at the University of Oregon found. But in sunlight, only 6.8 percent thrived. That was down to 6.1 percent for bacteria exposed to UV light.

Detailed explanation-4: -Bacteria only need light to survive if they are photosynthetic. The effect that a light will have on a bacteria will depend on the wavelength of the light, the bacteria’s sensitivity to the wavelength and the effect that the light has on its environment.