SATHEE: Optics Question 927

Optics Question 927

Question: A concave mirror gives an image three times as large as the object placed at a distance of $20 c m$ from it. For the image to be real, the focal length should be

[SCRA 1998; JIPMER 2000]

Options:

A) $10 c m$

B) $15 c m$

C) $20 c m$

D) $30 c m$

Show Answer

Answer:

Correct Answer: B

Solution:

$m = \frac{f}{f - u}$

$\Rightarrow - 3 = \frac{f}{f - (- 20)}$

$\Rightarrow f = - 15 c m$

Play Store

App Store

Ask SATHEE

Welcome to SATHEE !
Select from 'Menu' to explore our services, or ask SATHEE to get started. Let's embark on this journey of growth together! 🌐📚🚀🎓

I'm relatively new and can sometimes make mistakes.
If you notice any error, such as an incorrect solution, please use the thumbs down icon to aid my learning.
To begin your journey now, click on "I understand".

Optics Question 927

Question: A concave mirror gives an image three times as large as the object placed at a distance of 20cm from it. For the image to be real, the focal length should 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

Menu

Question: A concave mirror gives an image three times as large as the object placed at a distance of $20 c m$ from it. For the image to be real, the focal length should be