Question

When the radiation coming out from certain
radioactive substance is passed through an
electric field, marks are found at three places
on the photographic plate placed in its path.​

Answer 1

Answer:hee is ur answer mate

Explanation:

Because the radiation coming from the nuclear substance consists of

alpha rays

beta rays

and gamma rays

alpha rays are positively charged therefore they deflect towards the negatively charged Cathode..

Beta rays are negatively charged and therefore moves towards the positively charged anode.

And Gamma rays are electrically neutral therefore they are not deflected by the electric field..

Therefore a single ray coming from the nuclear substance gets divided into three rays and

strike the photographic plate at three places..

hope it helps u..

best of luck

Answer 2

Answer:

the rays were allowed to pass through an electricalfield and a photographic plate was held in their path. It was found that the radiation was divided into three types. One type of radiation deviated slightly towards the negatively charged plate,while the second type of radiation deviated substantially towards the positively charged plate. However, the third type of radiation did not deviate at all in the electrical field. The rays which deviated,slightly toward negatively charged plate are called alpha rays, those which deviate substantially towards the positively charged plate are called beta rays and those which do not deviate at all are called gamma rays.