State whether the light from an object moving towards us will be red shifted or blue shifted and explain why.
1 answer:
Answer:
The light from an object which is coming towards us will be blue shifted.
Explanation:
According to the Doppler effect the movement of the source towards the observer will lead to increase in thew apparent frequency by the Doppler formula,
Now when the there is increase in frequency then the wavelength is decrease because it is inversely related to frequency.
The wavelength of blue shift is lies in the range of 450-490 nm and the wavelength of red shift lies in the region of 635-700 nm.
Therefore, decrease in the wavelength will lead to blue shift.
You might be interested in
a. 0.5 T
- The amplitude A of a simple harmonic motion is the maximum displacement of the system with respect to the equilibrium position
- The period T is the time the system takes to complete one oscillation
During a full time period T, the mass on the spring oscillates back and forth, returning to its original position. This means that the total distance covered by the mass during a period T is 4 times the amplitude (4A), because the amplitude is just half the distance between the maximum and the minimum position, and during a time period the mass goes from the maximum to the minimum, and then back to the maximum.
So, the time t that the mass takes to move through a distance of 2 A can be found by using the proportion
and solving for t we find
b. 1.25T
Now we want to know the time t that the mass takes to move through a total distance of 5 A. SInce we know that
- the mass takes a time of 1 T to cover a distance of 4A
we can set the following proportion:
And by solving for t, we find