Question

what is the wave length in avaccum of microwave of a frequency of 15000Hz

Answer 1

Answer:

2×10⁴

frequency= speed of light/wave length

Answer 2

Answer- The above question is from the chapter 'Structure of Atom'.

Some basic information:

1. Wavelength (λ) - It is the distance between two consecutive crests or troughs.

2. Frequency (ν) - It is the number of waves passing through a point in one second.

3. Velocity (v) - It is the distance covered by a wave per second.

Velocity of light in vacuum (c) = 3 × 10⁸ m/s

v = λ ν

For electromagnetic radiations,

c = λ ν

Given question: What is the wave length in avaccum of microwave of a frequency of 15000 Hz?

Answer: We know that c = λ ν.

c = 3 × 10⁸ m/s

ν = 15 × 10³ Hz

λ = ?

Using the formula, c = λ ν

3 × 10⁸ = λ × 15 × 10³

λ = 3 × 10⁸ ÷ 15 × 10³

λ = 0.2 × 10⁵ m

λ = 2 × 10⁴ m

∴ Wavelength of a micro wave of a frequency of 15000 Hz in a vacuum is 2 × 10⁴ m.