Neon gas is generally used in sign booards. If it emits strongly at 616 nm, calculate:

(B) Distance travelled by this radiation in 30 s

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Solution

Velocity of radiation, (c) = $3.0 \times 10^{8} m s^{- 1}$
Distance travelled by this radiation in 30 s = $(3.0 \times 10^{8} m s^{- 1}) \times (30 s)$
= $9.0 \times 10^{9} m$

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Neon gas is generally used in the sign boards. If it emits strongly at 616 nm, calculate (a) the frequency of emission, (b) distance traveled by this radiation in 30 s (c) energy of quantum and (d) number of quanta present if it produces 2 J of energy

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