That Earth is spherical in space is not proved by which of the following statements: I. If Earth were flat there would be some sharp edges to be found by travellers. II. Solar eclipses show the shadow of earth as circular. III. Sunrise is not visible from

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Q: 61 (CDS-I/2004)
That Earth is spherical in space is not proved by which of the following statements:
I. If Earth were flat there would be some sharp edges to be found by travellers.
II. Solar eclipses show the shadow of earth as circular.
III. Sunrise is not visible from all places on Earths surface at the same time.
IV. The altitude of stars seen from different places on Earths surface vary,

question_subject: 

Geography

question_exam: 

CDS-I

stats: 

0,6,31,6,8,6,17

keywords: 

{'earths surface': [0, 0, 1, 0], 'solar eclipses': [0, 0, 1, 0], 'earth': [0, 1, 1, 1], 'earths': [0, 0, 1, 0], 'sunrise': [0, 1, 0, 0], 'space': [4, 1, 7, 12], 'altitude': [3, 0, 9, 13]}

Option 1 suggests that one can prove the Earth is not flat by looking for sharp edges. This is incorrect because even on a flat Earth, the horizon would still appear curved due to the Earth`s large size.

Option 2 states that solar eclipses show the shadow of the Earth as circular. This is incorrect because solar eclipses occur when the Moon blocks the Sun, and the shadow cast by the Moon is actually somewhat elongated due to the Moon`s shape.

Option 3 suggests that the visibility of the sunrise from different places is not evidence of a spherical Earth. This statement is correct. The reason sunrise is not visible from all places on Earth`s surface at the same time is because of the Earth`s curvature. As the Earth rotates, different regions come into view of the Sun, causing sunrise at different locations at different times.

Option 4 implies that all of the statements in options 1, 2, and 3 can prove that the Earth is not spherical. However, as discussed, options 1 and 2 are incorrect. Therefore, option 4 is also incorrect.

In conclusion, the correct answer is option 3, because the visibility of the sunrise from different places on Earth`s surface is not proof of a spherical Earth.