Two types of specialized fingerprint

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?

What is the speed of an object at a given moment?

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?