Answer:
What is the speed of a wave with a wavelength of 3 m and a frequency of .1Hz?
2 answers:
The correct answer to the question is 0.3 m/s i.e the speed of the wave is 0.3 m/s.
CALCULATION:
As per the question, the wavelength of the wave is given as
The frequency of the wave f = 0.1 Hz.
We are asked to calculate the speed [ V ] of the wave .
The relation among speed, frequency and wavelength of a wave is given as -
speed = frequency × wavelength
⇒ V = f ×
= 3m × 0.1 Hz
= 0.3 m/s. [ans]
Hence, the speed of the wave will be 0.3 m/s.
You might be interested in
The concept to develop this problem is the Law of Malus. Which describes what happens with the light intensity once it passes through a polarized material.
Mathematically this can be expressed as
Where
I = New intensity after pass through the Polarizer
= Original intensity
= Indicates the angle between the axis of the analyzer and the polarization axis of the incident light.
When the light passes perpendicularly through the first polarizer, the light intensity is reduced by half which will cause the intensity to be at the output of the new polarizer, mathematically:
Solving to find the angle we have
The orientation angle of the second polarizer relative to the first one is 43.11°