Author Question: The diameter of the Milky Way is 100,000 ly. This distance in SI units is A) 5 x 1015 m. B) ... (Read 26 times)

burchfield96 · **on:** Jul 29, 2018

The diameter of the Milky Way is 100,000 ly. This distance in SI units is

A)

5 x 1015 m.
B)

1 x 1021 m.
C)

4 x 1030 m.
D)

3 x 1036 m.
E)

2 x 1042 m.

Question 2

State how to draw the three rays for finding the image position due to a thin lens.

What will be an ideal response?

mochi09 · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

B

Answer to Question 2

Ray 1 leaves the top of the object and is drawn such that it is parallel to the axis; therefore it emerges from the lens along a line through the focal point on the back side of the lens.
Ray 2 leaves the top of the object and is made to pass through the other focal point; therefore it emerges from the lens parallel to the axis.
Ray 3 leaves the top of the object and is directed toward the very center of the lens; therefore it emerges from the lens at the same angle as it entered.