GK
BIG BANG THEORY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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shorter wavelength
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longer wavelength
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Either A or B
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None of the above
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Detailed explanation-1: -In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength and simultaneous increase in frequency and energy, is known as a negative redshift, or blueshift.
Detailed explanation-2: -The redshift is the shift from shorter wavelengths towards longer wavelengths [or from higher wave frequency to lower wave frequency].
Detailed explanation-3: -’Red shift’ is a key concept for astronomers. The term can be understood literally-the wavelength of the light is stretched, so the light is seen as ‘shifted’ towards the red part of the spectrum. Something similar happens to sound waves when a source of sound moves relative to an observer.
Detailed explanation-4: -redshift, displacement of the spectrum of an astronomical object toward longer (red) wavelengths. It is attributed to the Doppler effect, a change in wavelength that results when a given source of waves (e.g., light or radio waves) and an observer are in motion with respect to each other.