2025 Fall PHYS 2002 Exam 3 with Complete Solutions Louisiana State University

2025 Fall PHYS 2002 / Exam 3 with Complete Solutions
Louisiana State University

Started on Thursday, November 19, 2025, 6
08 PM State Finished
Completed on Thursday, November 19, 2025, 7
44 PM Time taken 1 hour 36 mins
Points 10.00/15.00
Grade 6.67 out of 10.00 (67%)




Question 1
Correct 1.00 points out of 1.00

Consider a light beam incident on a glass prism (n=1.5) as shown, where = 30o. Will
the beam leave the prism through the slanted side or through the bottom side?




Select one:
a.Slanted slide
b.Bottom side

c.It will keep reflecting on the inner surfaces

Your answer is correct.
The correct answer is: Slanted slide




Question 2
Correct 1.00 points out of 1.00

Can a real image produced by a spherical mirror be projected on a screen?

Select one:
a.It depends on the distance of the object to the mirror.
b.Yes.
c.No.

Your answer is correct.
The correct answers are: Yes., No.

, Question 3
Correct 1.00 points out of 1.00

A photographer wants to take a picture of a bird 1.50 m away with a 35.0mm lens.
How far from the lens must the film in a camera be?

Select one:
a.35.0mm

b.34.2mm
c.35.8mm

Your answer is correct.
The correct answer is: 35.8mm




Question 4
Correct 1.00 points out of 1.00

I have a convergent lens of focal length f = 3.5 cm. Where can I place an object to
produce a real image?

Select one:
a.Anywhere between 3.5 cm and 7.0 cm from the lens.

b.A convergent lens cannot produce a real image.

c.Farther than 7.0 cm from the lens.
d.At less than 3.5 cm from the lens.

Your answer is correct.
The correct answer is: At less than 3.5 cm from the lens.