In a converging lens, in order to get the image to be the exact same size as the object, then the object must be placed on the secondary focal point true or false​

Iwill give brainliest if you answer right : )

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?