# Wavelengths of light from a distant galaxy are found to be 0.44% longer than the corresponding wavelengths measured in a terrestrial laboratory. What is the speed that the wave is approaching?

Light always travels at the speed of light, in a vacuum,

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To calculate the speed at which the galaxy is approaching or receding, you can use the formula for redshift (z), which is related to the velocity (v) of the galaxy relative to us and the speed of light (c). The observed redshift (z) is given by the fractional increase in wavelength (Δλ/λ), where Δλ is the change in wavelength, and λ is the original wavelength.

Given:

- Δλ/λ = 0.44% = 0.0044 (converting percentage to decimal)

The formula relating redshift to velocity is:

[v = z \times c]

where:

- (v) is the velocity of the galaxy,
- (z) is the redshift,
- (c) is the speed of light ((c \approx 3.00 \times 10^8) m/s).

Substitute the given values into the equation:

[v = 0.0044 \times 3.00 \times 10^8 , \text{m/s}] [v = 1.32 \times 10^6 , \text{m/s}]

Therefore, the galaxy

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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