The focal length of the human eye is approximately 1.7cm.

Part A

What is thef-number for the human eye in bright light, when the pupil diameter is2.5mm?
f_{rm number}= __________

Part B
What is thef-number in dim light, when the pupil diameter has expanded to7.0mm?
f_{rm number}= __________

Express your answers using two significant figures.

"Get 15% discount on your first 3 orders with us"
Use the following coupon
"FIRST15"

Order Now