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A ray of light passing through principal focus of a convex lens after refraction will emerge -

This question was previously asked in
RRB JE CBT 2 ME 19 Sep 2019 Shift 2 Official Paper
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  1. Through the centre of curvature
  2. Through the principal focus
  3. Parallel to the principal axis
  4. Without any deviation

Answer (Detailed Solution Below)

Option 3 : Parallel to the principal axis

Detailed Solution

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CONCEPT:

  • All the cases for the ray of light emanating from the source and refracting through a convex lens are shown in the table:

Set 4 Rishi 15Q.docx 31

EXPLANATION:

  • From the above diagram, it is clear that a ray of light passing through the first principal focus of a convex lens emerges parallel to the principal axis after refraction. Therefore option 3 is correct.
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Latest RRB JE ME Updates

Last updated on Mar 27, 2025

-> The CBT II Examination is now scheduled for 22nd April 2025. 

-> The RRB JE Mechanical Notification 2024 was released for 1145 vacancies.

-> Candidates applying for the recruitment should have a Diploma or B.E/B.Tech degree in Mechanical Engineering or relevant streams.

-> The selection process of the JE Mechanical includes Computer-Based Test 1, Computer-Based Test 2, Document Verification, and Medical Examination.

-> The RRB JE Mechanical Salary for the selected candidates will be from Rs. 13,500 to Rs. 38,425.

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