Answer:
b) The star is moving away from us.
Explanation:
If an object moves toward us, the light waves it emits are compressed - the wavelength of the light will be shorter, making the light bluer. On the other hand, if an object moves away from us, the light waves are stretched, making it redder. If from laboratory measurements we know that a specific hydrogen spectral line appears at the wavelength of 121.6 nanometers (nm) and the spectrum of a particular star shows the same hydrogen line appearing at the wavelength of 121.8 nm, we can conclude that the star is moving away from npos, since the wavelength related to that star is more expanded.
Answer:
B
Explanation:
because if grocery store has a weak stability it will collapse when face strong naturally weather
Answer:
No, because as distance increases, gravitional force decreases.
A compound optical microscope or just a optical microscope is a microscope that uses light and has more than one lens.
The triangle <span>in the first law of thermodynamics, represents energy that moves from a hot object to a cooler object.</span>
