Ratio of skin depths of an Electromagnetic wave inside the conductor for the corresponding frequencies at 4 GHz and 9 GHz, considering the same material properties for both the frequencies is:

Ratio of skin depths of an Electromagnetic wave inside the conductor f

1.	Ratio of skin depths of an Electromagnetic wave inside the conductor for the corresponding frequencies at 4 GHz and 9 GHz, considering the same material properties for both the frequencies is:
A.	9 ∶ 4
B.	4 : 9
C.	3 : 2
D.	2 : 3
Answer» D. 2 : 3