Question

Explain conditions necessary for twilight all nights, continuous daylight or continuous darkness.

Answer 1

Conditions necessary for twilight all night. For an observer to have twilight, the sun must set, therefore, he must have some night. 1. If the observer's latitude and the sun's declination are of opposite name

Conditions are necessary for continuous Daylight (Midnight Sun)

For continuous DAYLIGHT (Midnight Sun), the observer’s latitude and sun’s declination should be of the same nameand the limiting latitudes are obtained as:

lat + dec >/= 90° (so that the sun will NOT set)

Conditions are necessary for continuous Night

For continuous Night, the observer’s latitude and sun’s declination should be of the different name and the limiting latitudes are obtained as: lat + dec >/= 90° (so that the sun will NOT RISE)

Answer 2

Explanation:

Condition for twilight is that there should be night and in sky there should be no cloud

Condition for daylight that everyhour continous we get light from sun then there be continous daylight .

Condition for darkness is that there should be no single light fall on that place

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