Different types of radiation have different penetrating abilities. for example, gamma rays can pass through cloth and paper, but alpha particles are blocked by cloth and paper. beta particles are blocked by aluminum foil, but gamma rays are not. however, all three types of radiation are blocked by thick concrete or lead.

now, examine a table of penetrating powers of different types of radiation.

material
1 2 3 2
lead stopped stopped stopped
cloth not stopped stopped stopped
aluminum foil not stopped stopped stopped
wood not stopped stopped stopped
paper not stopped stopped not stopped
thick concrete stopped stopped stopped

based on the information, at which numbered spot in the table does each type of radiation belong?
1 = beta; 2 = alpha, 3 = gamma
1 = alpha; 2 = beta, 3 = gamma
1 = beta; 2 = gamma, 3 = alpha
1 = gamma; 2 = alpha, 3 = bet

The correct answer is 1 = gamma, 2 = alpha, and 3 = beta radiations.

Explanation:

Based on the given data, all the radiations got blocked by the block of lead, the aluminum foil and the wood possesses the tendency to prevent alpha and beta particles to pass through, while paper can stop the alpha particles but it is not used to prevent gamma and beta rays to pass through, and the thick concrete is used to block all the radiations.  

The power of penetration of the alpha, beta, and the gamma rays differs significantly. The alpha particles can be prevented by some pieces of paper, the beta particles can go through the paper, and however, they are blocked by aluminum foil. While the gamma rays are the toughest to prevent and need lead, or concrete, or another heavy shield to prevent them from passing by.  

This shows that the first radiation is the gamma rays, the second one is the alpha rays, and the last or the third one is beta rays.  

b a mature ovary of a plant.