कोई छोटी वस्तु जो कि विश्राम अवस्था में है, ये \(20 \mathrm{~mW}\) शक्ति वाली प्रकाश स्पन्द को \(300 \mathrm{~ns}\) के समयान्तराल तक अवशोषित करती है। माना प्रकाश की चाल \(3.6 \times 10^6 \mathrm{~m} / \mathrm{s}\) है, वस्तु का संवेग \(........\times 10^{-17} kg\,m / s\)हो जाएगा :

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.