A beam of light polarized along the y axis and moving along the +z axis passes through two polarized sheets with axes of polarization oriented 30◦ and 70◦ relatives to the y axis. The final intensity of the beam is measured to be 61 W/m2. What is the initial beam intensity? Express your answer to the nearest W/m2.

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A beam of light polarized along the y axis and moving along the +z axis passes through two polarized sheets with axes of polarization oriented 30◦ and 70◦ relatives to the y axis. The final intensity of the beam is measured to be 61 W/m2. What is the initial beam intensity? Express your answer to the nearest W/m2.
Question 7
1 pts
In the figure below (not to scale), object O is placed in front of two
thin converging lenses L1 and L2, with focal lengths f1 30.0 cm and
f2 = 10.0 cm, respectively.
%3D
L1
L2
00
The lens separation distance is 12.0 cm, and the object is 6.0 cm to
the left of lens L1.
Where does the system of two lenses produce an image of the
object?
10.0 cm to the left of L2
O 20.5 cm to the left of L2
O 6.0 cm to the right of L2
O 20.5 cm to the right of L2
O 20.5 cm to the right of the object
O 10.0 cm to the right of L2
6.0 cm to the right of the object
O none of these
Transcribed Image Text:Question 7 1 pts In the figure below (not to scale), object O is placed in front of two thin converging lenses L1 and L2, with focal lengths f1 30.0 cm and f2 = 10.0 cm, respectively. %3D L1 L2 00 The lens separation distance is 12.0 cm, and the object is 6.0 cm to the left of lens L1. Where does the system of two lenses produce an image of the object? 10.0 cm to the left of L2 O 20.5 cm to the left of L2 O 6.0 cm to the right of L2 O 20.5 cm to the right of L2 O 20.5 cm to the right of the object O 10.0 cm to the right of L2 6.0 cm to the right of the object O none of these
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