What is the angular diameter of the earth viewed from the moon? What about the earth viewed from the sun?
From Moon at 384000 km from the Earth,, Earth's angular diameter is
From the Sun instead, #EO = 149597871-696342 = 148901529 and sin (alpha/2) = (EP)/(EO) = 6378/148901529 = 0.0000428
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When looking at the Earth from the Moon, its angular diameter is about 2 degrees; when looking at the Earth from the Sun, it is approximately 0.53 degrees.
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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.
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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- If a wave hits a surface at an angle of 55 degrees, will the angle of refraction be the same as the angle of incidence or will it be perpendicular to the angle of incidence?
- Is there an estimation of how many stars there are in this known universe?

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