An electromagnetic wave completes oscillations in as it travels through vacuum

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

An electromagnetic wave completes

2000

oscillations in

1.0\,\text{ms}

as it travels through vacuum. Determine its wave number

k

. (a)

0.0126\,\text{rad m}^{-1}

(b)

0.84\,\text{rad m}^{-1}

(c)

0.042\,\text{rad m}^{-1}

(d)

0.0067\,\text{rad m}^{-1}