એક લેન્સનો પાવર -4.0 Diopter છે, તો આ લેન્સ __________ હશે.

A અંતર્ગોળ અને કેન્દ્રલંબાઈ -25.0 cm
B અંતર્ગોળ અને કેન્દ્રલંબાઈ - 0.25 cm
C બહિર્ગોળ અને કેન્દ્રલંબાઈ +0.25 cm
D બહિર્ગોળ અને કેન્દ્રલંબાઈ +25.0 cm

Verified Solution

Answer & Solution

Correct Answer

(A) અંતર્ગોળ અને કેન્દ્રલંબાઈ -25.0 cm

Step-by-step Solution

Detailed explanation

A.અંતર્ગોળ અને કેન્દ્રલંબાઈ -25.0 cm
પાવર \(P =\frac{1}{f}\)
\(\therefore \quad f=\frac{1}{ P }\)
\(\therefore \quad f=\frac{1}{-4}\)
\(\therefore \quad f=-0.25 m\)
\(\therefore \quad f=-25 cm\)

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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