4 সেমি উচ্চতার একটি সুঁচ 45 সেমি দূরত্বে 30 সেমি ফোকাল লেন্থের অবতল লেন্সের সামনে স্থাপন করা হয়। সুঁচের চিত্রের উচ্চতা কত হবে?

This question was previously asked in
RRB Group D 19 Sept 2022 Shift 3 Official Paper
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  1. 2.2 সেমি 
  2. 1.6 সেমি 
  3. 1.9 সেমি 
  4. 2.5 সেমি 

Answer (Detailed Solution Below)

Option 2 : 1.6 সেমি 
Free
RRB Group D Full Test 1
100 Qs. 100 Marks 90 Mins

Detailed Solution

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সঠিক উত্তরটি হল​ 1.6 সেমি 

প্রদত্ত:

 এর একটি অবতল লেন্সে রাখা একটি সুঁচ

সূত্র:

লেন্স সূত্র: 

গণনা:

সুতরাং,  একটি অবতল লেন্সের জন্য

অতএব, সুঁচের উচ্চতা হল:

সুতরাং, সুঁচ দ্বারা তৈরী চিত্রের উচ্চতা 1.6 সেমি

Latest RRB Group D Updates

Last updated on Jul 11, 2025

-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.

-> The RRB Group D Exam Date will be soon announce on the official website. Candidates can check it through here about the exam schedule, admit card, shift timings, exam patten and many more.

-> A total of 1,08,22,423 applications have been received for the RRB Group D Exam 2025. 

-> The RRB Group D Recruitment 2025 Notification was released for 32438 vacancies of various level 1 posts like Assistant Pointsman, Track Maintainer (Grade-IV), Assistant, S&T, etc.

-> The minimum educational qualification for RRB Group D Recruitment (Level-1 posts) has been updated to have at least a 10th pass, ITI, or an equivalent qualification, or a National Apprenticeship Certificate (NAC) granted by the NCVT.

-> This is an excellent opportunity for 10th-pass candidates with ITI qualifications as they are eligible for these posts.

-> The selection of the candidates is based on the CBT, Physical Test, and Document Verification.

-> Prepare for the exam with RRB Group D Previous Year Papers.

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