Question

Yellow light travels through a certain glass block at a speed of 1.97 × 108 m/s. The wavelength of the light in this particular type of glass is 3.81 × 10−7 m (381 nm). What is the frequency of the yellow light in the glass block? Answer in units of H

Answer 1

The frequency of the yellow light is $5.17\cdot 10^{14}Hz$

Explanation:

The relationship between wavelength, frequency and speed of a wave is given by the wave equation:

$v = f \lambda$

where

v is the speed of the wave

f is the frequency

$\lambda$ is the wavelength

For the yellow light in this problem, we have:

$v=1.97\cdot 10^8 m/s$ is the speed

$\lambda=3.81\cdot 10^{-7} m$ is the wavelength

Solving for f, we find its frequency:

$f=\frac{v}{\lambda}=\frac{1.97\cdot 10^8}{3.81\cdot 10^{-7}}=5.17\cdot 10^{14}Hz$

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Answer 2

The frequency of the yellow light in the glass block is $5.17 \times 10^{14}Hz$

Given information:

Yellow light travels through a certain glass block at a speed of 1.97 × 108 m/s. The wavelength of the light in this particular type of glass is 3.81 × 10−7 m (381 nm).

Calculation of the frequency:

$= 1.97 \times 10^8 \div 3.81 \times 10^{-7}\\\\= 5.17 \times 10^{14}Hz$

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