PHYSICS

JAMB 2008 - Question 37

Physics 2008 JAMB Past Questions - Question 37: An observer with normal eyes views an object with a magnifying glass of focal length 5cm. The angular magnification is

Choose the correct answers from the options given.
An observer with normal eyes views an object with a magnifying glass of focal length 5cm. The angular magnification is
A:
B:
C:
D:
Examkits App

Examkit's JAMB CBT App

Practice JAMB offline with our Online, PC and Mobile App

  • ✅ 25+ years of past questions (2000 to 2025)
  • ✅ Video solutions and explanation to questions
  • ✅ E-library
  • ✅ Study by topic
  • ✅ And more.

Correct Answer

D

Explanation

Angular magnification, M = - where D is least distance of distinct vision.therefore M = - (25/5 +1) = - 6
The angular magnification of a magnifying glass or any optical system can be calculated using the formula:

Angular Magnification (M) = 1 + (D / F)

Where:
- M is the angular magnification.
- D is the least distance of distinct vision, typically taken to be about 25 cm for a person with normal eyesight.
- F is the focal length of the magnifying glass.

In your case, you mentioned that the focal length of the magnifying glass is 5 cm. The least distance of distinct vision (D) is approximately 25 cm for a person with normal eyes.

Now, plug these values into the formula:

M = 1 + (25 cm / 5 cm)

M = 1 + 5

M = 6

So, the angular magnification when an observer with normal eyes uses a magnifying glass with a focal length of 5 cm is 6.

Frequently Asked Questions

Examkits is a JAMB CBT practice platform that provides over 20 years of past questions, Post UTME questions, and detailed video solutions to help students prepare for their exams.

You can practice JAMB past questions online, on Android, or on a desktop using the Examkits app. Just register on our website and choose your preferred device.

Yes. Our Android and Windows versions support offline usage. Once downloaded and activated, no internet is required to use most of the features.

Yes, Examkits provides detailed video explanations for all JAMB past questions from 2000 to 2024, helping students understand how to solve each problem.

Examkits offers free practice for some subjects. However, full access requires a one-time affordable activation fee for each version of the app.