They emit radiations because of their glow in the dark properties which is brought out by radium and tritium which are radioactive and clearly emit radiations.
No, different objects give out different heat radiations.
As your teacher..............
In the days of manual wind up watches it was so you could wind your watch up without taking it off.
If you don't know how, I suggest taking it to a Jeweler, to avoid any damage you might cause. Jewelers have special tools for watches.
How do radiations produce heat?
Americium emit alpha particles and gamma radiations.
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Since any radiation contains energy, it follows that most radiations can be converted into electricity, with the appropriate equipment.
No, different objects give out different heat radiations.
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Yes nuclear energy can cause very serious health problems, as nuclear reactions give out nuclear radiations which ionise the blood cells and can even cause blood cancer. These nuclear radiations are also called ionising radiations.----JAYRAJ Patel
Yes, uranium gives off dangerous amounts of radiation.
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As your teacher..............
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From these isotopes decay products are obtained and also ionizing radiations.
Radiations within the range of 200 - 400nm are Visible Radiations. And others out of this range are invisible radiations.