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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class12  >>  Electromagnetic Waves
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Some radio waves of frequency of about $1.5 \times 10^9$ Hz were received by a radio-telescope from distant star. If the speed of the waves is $3 \times 10^5 \: km/s$, then the wave- length of the wave will be:

$\begin {array} {1 1} (a)\;0.1 \: m & \quad (b)\;0.6\: m \\ (c)\;0.2\: m & \quad (d)\;0.46\: m \end {array}$

 

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