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What is the purpose of an experiment design?

1 answer:

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An experimental design is used to assign variables for testing. In contrast to a control design where nothing is changed, the experimental design allows you to test various new inputs to see how they would vary from the original results.

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Suppose that you observe light emitted from a distant star to be at a wavelength of 525 nm. The wavelength of light to an observ

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The velocity of the star is 0.532 c.

Explanation:

Given that,

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From Doppler effect

$\lambda_{0}=\sqrt{\dfrac{c+v}{c-v}}\times\lambda_{s}$

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Negative sign shows the star is moving toward the observer.

Hence, The velocity of the star is 0.532 c.

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