Well, if you had a shadow cast on earth, it would appear curved because the of the Earth's surface is curved
Think about it this way. If it was flat then jet streams would be straight. But the Earth is round so jet streams are curved because of the curvature of the Earth.
We know the moon is round because of the way its surface appears when observed from Earth. Through telescopes and spacecraft, we can see that its shape is consistent with a sphere, curved in all directions. Additionally, the way shadows move across its surface during different phases further supports its roundness.
This is not really a "why" sort of question.The moon has a shadow, because it's a solid opaque object.The moon's shadow sometimes falls on the Earth, because the Earth, Moon, and Sun are sometimes arranged so that that can happen.When that happens, we call it a solar eclipse. We could call it a mumblefrazz instead, and then I suppose you'd be asking why the moon's shadow was cast on Earth during a mumblefrazz.If the moon were smaller, or further away, its shadow would never fall on the earth (technically, its penumbra or anteumbra still would, but its umbra would not) and we'd never experience total mumblefrazzes.
To observe a lunar eclipse, you need to be in the area where the shadow of the Earth falls on the Moon. This occurs when the Earth passes between the Sun and the Moon, casting its shadow on the lunar surface.
A person standing on the moon would see a partial solar eclipse when the Earth partially blocks the Sun's light. This is because the Earth's size in the moon's sky would be large enough to create this effect, similar to how the Moon creates a solar eclipse on Earth.
Straight, curved are hard on your back.
If the Earth were flat, it would cast a straight and uniform shadow, similar to a rectangular shape, as it would obstruct the light from the Sun in a consistent manner. The size and orientation of the shadow would vary depending on the position of the Sun in the sky.
Think about it this way. If it was flat then jet streams would be straight. But the Earth is round so jet streams are curved because of the curvature of the Earth.
The one on the right because if the one on the left show'd it then we'd all have IPhone's and if we all had IPhone's most of us would turn gay and if most of us turned gay then God would of broke his promise by flooding the Earth again. -Aristotle
Gravity. Things naturally travel in a straight line unless another force acts on them. The moon would travel in a straight line but is dragged down by the gravity of the earth. This constant acceleration towards the earth causes it to orbit the earth in a curve.
Straight trimmers give you more reach and have more power for cutting tall weeds. Curved trimmers are better for tight spaces.
Yes, they would be a little more common than they are. A lunar eclipse happens when the Moon goes into the shadow of the Earth. If the Earth was larger, the Earth's shadow would also be larger. For some times when the Moon currently just misses the Earth's shadow, if the Earth (and its shadow) were larger, the Moon wouldn't miss.
During a solar eclipse, the moon passes between the sun and the Earth, casting a shadow on the Earth's surface. The shadow creates a distinct boundary between the areas of total and partial darkness, demonstrating that light travels in straight lines. This phenomenon is known as the rectilinear propagation of light, which is a fundamental principle of optics.
I've never heard of anyone using a curved needle for any kind of piercing. But, a straight needle would be much easier for a tragus. A lot of force has to be used to pierce the tragus and that would be difficult with a curved needle. Also, I could imagine that the curved needle would hit the cartilage/ear behind your tragus after it was pierced. Just get it done with a straight one.
Yes, a shadow is proof that light travels in a straight line because shadows are formed when an object blocks light that is traveling in a straight path from the source to the surface where the shadow is cast. If light did not travel in a straight line, shadows would not form as they do.
The opposite of straight could be crooked, curved, turned, or bent. The opposite of straight (honest) could be dishonest, devious, or corrupt. The opposite of straight (slang for heterosexual) would be gay.
Not strictly true to say that the rotation causes the shadow. Part of the Earth would be shaded from the Sun whether or not the Earth rotated.