Incomplete question.The Complete question is here
List these types of electromagnetic radiation in order of (i) increasing frequency and (ii) decreasing energy per photon. a. gamma rays, b. radio waves, c. microwaves, d . visible light
Answer:
(i) (b) ,(c), (d), (a)
(ii) (a), (d), (c), (b)
Explanation:
For Part (i) increasing frequency
The frequency is directly proportional to energy.Therefore the order of increasing frequency is in the same direction as increasing energy
So the order is
(b) ,(c), (d), (a)
For Part (ii) decreasing energy per photon
This should be reverse direction from part (i)
(a), (d), (c), (b)