MPSC Rajyaseva 2017 GS Paper 1 — Question 54
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लांबीचे नवीन एकक असे निवडले की ज्यानुसार निर्वात पोकळीत प्रकाशाची गती 1 एकक येते. जर सूर्यप्रकाश, सूर्यापासून पृथ्वीपर्यंतचे अंतर 8 मिनिट व 20 सेकंदात कापत असेल, तर लांबीच्या नवीन एककानुसार सूर्य व पृथ्वीमधील अंतर किती ? A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit, if light takes 8 minutes and 20 seconds to cover this distance ?
Time = 8 min 20 sec = 500 seconds. Since speed of light is 1 unit in the new system, distance = speed × time = 1 × 500 = 500 units.
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