Question

A 2 inch, f/4 reflector has a focal length of.

A) 2 inches
B) 4 inches
C) 6 inches
D) 8 inches

Answer 1

I think it might be 8 inches

Step-by-step explanation:

My reasoning for this answer is that when you want the focal length of a telescope, you multiply the number behind the "f/?" so in other words, it would be

2 * 4 = 8

Answer 2

The answer is B.) 4 inches