SATHEE: Optics Question 650

Optics Question 650

Question: A lens which has focal length of 4 cm and refractive index of 1.4 is immersed in a liquid of refractive index 1.6, then the focal length will be

[RPMT 1999]

Options:

A) - 12.8 cm

B) 32 cm

C) 12.8 cm

D) - 32 cm

Show Answer

Answer:

Correct Answer: A

Solution:

$\frac{f_{l}}{f_{a}} = (\frac{_{a} μ_{g} - 1}{_{l} μ_{g} - 1}) \Rightarrow \frac{f_{l}}{4} = \frac{(1.4 - 1)}{\frac{1.4}{1.6} - 1} \Rightarrow f_{l} = - 12.8 c m$

Optics Question 650

Question: A lens which has focal length of 4 cm and refractive index of 1.4 is immersed in a liquid of refractive index 1.6, then the focal length will be

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Optics Question 650

Question: A lens which has focal length of 4 cm and refractive index of 1.4 is immersed in a liquid of refractive index 1.6, then the focal length will be

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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