Why Do We See a Gravitational Redshift in the Spectrum

question 45

Multiple Choice

Why do we see a gravitational redshift in the spectrum of the Sun?

• A)Time runs slower on the Sun than on Earth,making lines in the solar spectrum have lower frequency and hence longer wavelength than normal.
• B)Gravity makes light heavy,causing it to appear redder.
• C)Because of gravity,the Sun is always moving away from us so we see a redshift.
• D)Spacetime curvature allows red photons of light to escape the Sun more easily than blue photons,leading to an apparent redshift.

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Definitions:

Annual Cost

The total expenses associated with maintaining or operating something over the course of a year.

Useful Life

The estimated period over which a fixed asset is expected to be useful to the owning entity, crucial for calculating depreciation.

Machine

Equipment or devices designed to perform specific tasks, often used in manufacturing and production processes.

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Commonly denotes the internal rate of return (IRR), the discount rate at which the net present value (NPV) of all cash flows from a specific project is zero.