Tag: eclipses

Questions Related to eclipses

Fill in the blank:

Lunar eclipse is a _______ phenomenon.

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. common

  2. less common

  3. impossible

  4. regular

Show answer
Correct Option: B
Explanation:

A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the Sun, Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a full moon. The type and length of an eclipse depend upon the Moon's location relative to its orbital nodes.
Unlike a solar eclipse, which can only be viewed from a certain relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of the Earth. A lunar eclipse lasts for a few hours, whereas a total solar eclipse lasts for only a few minutes at any given place, due to the smaller size of the Moon's shadow. 
Every year, there are at least two lunar eclipses and as many as five, although total lunar eclipses are significantly less common. 

The lunar eclipse is generally :  

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. partial

  2. total

  3. either (a) or (b)

  4. cannot say

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Correct Option: B

A solar eclipse can occur only on a -

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. new moon day

  2. full moon day

  3. half moon day

  4. none of these

Show answer
Correct Option: A
Explanation:

Solar eclipse can occur only on a new moon day & a lunar eclipse can occur only on the night of a full moon.

Ans: new moon day

When the sun, the earth and the moon come to lie in a straight line it causes -

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. earthquakes

  2. eclipses

  3. eruption of volcanoes

  4. none of these

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Correct Option: B
Explanation:

When the sun, earth and moon come in straight line it causes eclipses.

Ans : Eclipse

A solar eclipse is caused when the -

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. sun comes between the earth and the moon

  2. moon comes between the sun and the earth

  3. earth comes between the sun and the moon

  4. none of these

Show answer
Correct Option: B
Explanation:

A solar eclipse is caused when moon comes between sun and earth and moon casts a shadow over earth. 

Ans: moon comes between sun and earth

State whether true or false.
The outer rim of the sun which is only visible in an annular solar eclipse is called corona.

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. True

  2. False

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Correct Option: A
Explanation:

The outer rim of the sun which is visible in an annular solar eclipse is called corona.

Ans:True

State whether true or false.
Eclipses are examples of the formation of shadows in nature.

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. True

  2. False

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Correct Option: A
Explanation:

Lunar eclipse occur whenever the moon passes into the shadow of earth. Solar eclipse occur when the new moon eclipse slips in front of the sun and blocks it from view. This moon's shadow then falls upon the earth.

State whether true or false.
The sun will not be visible during a lunar eclipse.

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. True

  2. False

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Correct Option: A
Explanation:

During lunar eclipse position of sun and moon will be in the same line. In this configuration both sun and moon will not be visible.

Ans: True

State whether true or false.
Solar eclipse takes place when Jupiter comes in between the earth and the moon.

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Solar eclipse occurs when moon comes between earth and sun.

Ans: False

State whether true or false.
Solar eclipse is a phenomenon more frequent than a Lunar eclipse.

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Lunar eclipses are more common than solar eclipse.