suppose that you look into the photometer's eyepiece and the fluorescent disks appear to be equal in intensity. if the distance between the photometer to lamp 1 is 400 mm, the distance between the photometer to lamp 2 is 200 mm, and the intensity of lamp 2 is known to be 15 candelas, what is the intensity of lamp 1? . 75 candelasb. 80 candelasc. 45 candelasd. 60

This is definitely the Brainliest Answer and is definitely the correct D .60 Candelas

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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the answer to your question is c