The moon is $4 \times 10^{8}$ m from the earth. A radar signal transmitted from the earth will reach the moon in about

5.2 s

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1.3 s

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2.6 s

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0.70 s

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Solution

The correct option is B 1.3 s
The moon is $4 \times 10^{8}$ m from the earth. A radar signal transmitted from the earth will reach the moon in about.
let the speed of radar signal is speed of light $c = 3 * 10^{8} m / s$

$T i m e = \frac{d i s t a n c e}{s p e e d} = \frac{4 * 10^{8}}{3 * 10^{8}} = 1.3 s$

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The moon is 4×108 m from the earth. A radar signal transmitted from the earth will reach the moon in about

The correct option is B 1.3 sThe moon is 4×108 m from the earth. A radar signal transmitted from the earth will reach the moon in about. let the speed of radar signal is speed of light c=3∗108m/s Time=distancespeed=4∗1083∗108=1.3s

The moon is $4 \times 10^{8}$ m from the earth. A radar signal transmitted from the earth will reach the moon in about