What would extreme radiation do to the body?

People usually talk about the dose of radiation received. I read somewhere that a CT scan of the head was equivalent to 4 round trip coast to coast flights in the US for example. Nominally the amount of radiation received in these two cases is the same...

I'm quiet confused with the definition of a black body?it absorbs all wavelength of EM radiation,not reflects but how emits all wave length EM,i thought it only emits thermal radiation.under what condition emits?.how stars are approximate black bodies...

What exactly takes place when one is exposed to high levels of radiation?  How does it affect your body and why does it do what it does?

Hi, I need this for my science class. what type of radiation on the electromagnetic spectrum can be detected by the Human body? I think it's X-rays but IDK

What fraction of the total energy density in a cavity filled with black body radiation at 5000 K is in the range 5.80 × 10^14 Hz and 5.85 × 10^14 Hz?

Question says it all. Is it just another word for infrared radiation?

I'm using the iPad more and more, I notice that I find it most comfortable to have it partially rest against my stomach/legs. The more I do this (every-day now) and the more hours at a time - I get bothered by the potential implications of WiFI going...

-Total body exposure of 100 roentgens causes radiation sickness. -Total body exposure of 400 roentgens causes radiation sickness and death in half the individuals. -100,000 rads causes almost immediate unconsciousness and death within an hour These are...

Radiation from diffrent sources is likely to increase over passage of time. Is it possible that with continuous exposure to radiation human body can become immune to its harmful effects? What genetic changes are likely to develop under radiation?