Barium Sulfate.
Lead is most often used as an insulation for X-rays. It blocks X-rays. That is what is inside those blankets dentists put over you when they X-ray your teeth.
Barium salt mainly Barium sulfate is good absorber of X-rays and help stomach to appear clear
None if they use a vest on you. The vest contains lead which blocks all x-rays besides those aimed at your mouth.
X-rays and gamma rays from the sun are black by the atmosphere. The ozone layer partially blocks out ultraviolet rays, but some do get through, creating a risk of sunburn, skin cancer, and eye damage.
Ozone layer blocks the UV rays. It does it in the ozone layer.
Lead is a common material that blocks gamma rays and prevents their penetration.
Salt blocks are made by extracting salt from salt mines or salt pans. The extracted salt is then purified, crystallized, and compressed under high pressure to form solid blocks. These blocks are usually used for cooking, grilling, or as a serving platter for food.
The ozone layer in the stratosphere blocks gamma rays from reaching the Earth's surface.
It is called an eclipse when Earth blocks the sun's rays from reaching it.
salt blocks are made of salt (obviously) and salt makes a horse thirsty. This makes them drink more water.
what blocks some of the dangerous rays that may cause skin cancer
Ozone blocks the UV rays. UV rays are harmful rays of the sun.