Solution Found!
Suppose a lens is made from fused quartz (glass), and that
Chapter 26, Problem 127PP(choose chapter or problem)
Problem 127PP
Suppose a lens is made from fused quartz (glass), and that its focal length in air is −7.75 cm. What is the focal length of this lens if it is immersed in benzene? (Refer to Table.)
A. –130 cm
B. 134 cm
C. 141 cm
D. −145 cm
Questions & Answers
QUESTION:
Problem 127PP
Suppose a lens is made from fused quartz (glass), and that its focal length in air is −7.75 cm. What is the focal length of this lens if it is immersed in benzene? (Refer to Table.)
A. –130 cm
B. 134 cm
C. 141 cm
D. −145 cm
ANSWER:
Step 1 of 2
Here we need to find the focal length of the given lens when it is immersed in benzene. The given lens is having a focal length in air as and is made of fused quartz (glass).
Given data,
Focal length of lens in air,
From Table 26-2, we have
Refractive index of glass or lens,
Refractive index of benzene fluid,
To find,
Focal length of lens in benzene fluid,