25. HOTS Questions II

1. 'X- rays should not be taken often'. Give the reason.

 

Cosmic energiesRadiationsExpenses are involved in X- rays tests and isotope scans in hospitalslaboratoriesnuclear medicine are very highvery highless to cause any immediate hazardous effects.

If an X- ray is taken often, then X- ray radiation from medical examinations slightly increases the risk for anaemialoss of eye sightcancer. This may occur after a year or decades from the exposure to X- ray.

2. Cell phone towers should be placed far away from the residential area – why?

 

Cell phone towers generally communicate through infrared frequencyUV signalsmicrowave signals.

 

If the cell towers are placed near residential areas, the light raysradiationcosmic energy emitted from the towers might cause harmful health effects on the human bodynon-living thingscell phones.

 

Hence, it is not advisable to place cell phone towers near a residential area.