Question Detail

Radiocarbon is produced in the atmosphere as a result of

collision between fast neutrons and nitrogen nuclei present in the atmosphere
action of ultraviolet light from the sun on atmospheric oxygen
action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
lightning discharge in atmosphere

Answer: Option A

Similar Questions :

1. What is the range of mercury thermometer ?

0 degree Celsius to 350 degree Celsius
-10 degree Celsius to 350 degree Celsius
-20 degree Celsius to 350 degree Celsius
-30 degree Celsius to 350 degree Celsius

Answer: Option D

2. All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit.

True
False

Answer: Option A

3. The absorption of ink by blotting paper involves

capillary action phenomenon
viscosity of ink
siphon action
diffusion of ink through the blotting

Answer: Option A

4. If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this ?

Newton first law
Newton second law
Newton third law
Principle of conservation of linear momentum

Answer: Option D

5. What is refractive index ?

it is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
it is defined as the ratio of speed of light in vacuum to the speed of light in the medium .
it is defined as the product of speed of light in medium and in vacuum.
None of above

Answer: Option B

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