\(20 \mathrm{~cm}\) વક્રતા ત્રિજયા અને \(1.5\) વક્રીભવનાંક ધરાવતી બહિર્ગોળ સપાટી પર એક બિંદુવત પ્રકાશ ઉદગમ માંથી પ્રકાશ આપાત થાય છે. જો આ બહિર્ગોળ સપાટીથી ઉદગમ \(100 \mathrm{~cm}\) અંતર આવેલ હોય તો વસ્તુથી _______ \(\mathrm{cm}\) અંતરે પ્રતિબિંબ રચાય.

A \(100\)
B \(200\)
C \(300\)
D \(400\)

Verified Solution

Answer & Solution

Correct Answer

(B) \(200\)

Step-by-step Solution

Detailed explanation

\(\frac{\mu_2}{\mathrm{v}}-\frac{\mu_1}{\mathrm{u}}=\frac{\mu_2-\mu_1}{\mathrm{R}}\) \(\frac{1.5}{\mathrm{v}}-\frac{1}{-100}=\frac{1.5-1}{20}\) \(\mathrm{v}=100 \mathrm{~cm}\) પદાર્થથી અંતર \(=100+100\) \(=200 \mathrm{~cm}\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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