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Q.

Neon gas is generally used in the sign boards. If it emits strongly at 616 nm. The distance travelled by this radiaiion in 30s is  9×10z   m.The value of z is

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answer is 9.

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Detailed Solution

velocity=distance timedistance = 3x108 x 30 =9x109
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Neon gas is generally used in the sign boards. If it emits strongly at 616 nm. The distance travelled by this radiaiion in 30s is  9×10z   m.The value of z is