Uniform motion means no part of the motion is changing.
The two parts of motion are . . . speed and direction.
If neither part is changing, that means constant speed in a straight line.
Explanation :
It is given that, parallel wave fronts are incident on an opening in a barrier. Diffraction of the waves depends on the size of opening and the wavelength of light used as per the following relation :
where,
is the wavelength of light
and a is the opening size (from fig)
So, it is clear that diffraction of waves depends directly on the wavelength of light and inversely on the size of opening.
Hence, the correct option is (2).
Answer and Explanation:
In case, I lived in the Crater Copernicus on Moon's side facing the Earth then:
- On moon, as it orbits the Earth, it takes 29 and a half days to complete one cycle of sunrise and sunset. So, the would rise once in 29 and a half day.
- The moon orbits the Earth in such a way that the its same side faces the Earth always which concludes that the Earth is overhead every time resulting in no Earth rise or Earth set on Moon.
- Due to the thin atmosphere, it can't impart any specific color to the sky on the moon as a result of which the moon's sky is always black and hence, stars can be seen every time.
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth. Tide tables can be used to find the predicted times and amplitude (or "tidal range") of tides at any given locale.
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