GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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redshift
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blueshift
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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: -’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-3: -"This phenomenon was observed as a redshift of a galaxy’s spectrum, ” NASA wrote. “This redshift appeared to be larger for faint, presumably further, galaxies. Hence, the farther a galaxy, the faster it is receding from Earth.” The galaxies are moving away from Earth because the fabric of space itself is expanding.
Detailed explanation-4: -Doppler shift This apparent change in wavelength can also be observed for the visible light emitted by stars or galaxies.