on Solar Eclipse:
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Eclipse > FAQ
on Solar Eclipse:
on Solar Eclipse
Eclipse – an opportunity for Science Popularisation:
About the Eclipse ?
occurs when the Earth, Moon and Sun move into a direct line, with the
Moon in the middle. When the Sun is not at the zenith during the totality,
we get an annular eclipse. In this the outer rim of the Sun in visible.
Does a Total Solar Eclipse Occur ?
a fortunate coincidence, the sun’s diameter is 400 times larger
that that of the moon, and at the same time, it is 400 times as for
away. From where we are, this creates the illusion that they are the
same size. If we look through the filter at the Sun, it looks exactly
like the Moon on a full moon night.
the moon passes in front of the sun, its shadow falls on the earth it
appears to exactly cover the sun’s disc. This is what a solar
eclipse is a shadow. So in essence, an eclipse is no more evil than
the shadow of a tree, or a tall building. The moon just blocks off the
light of the sun for a brief, beautiful moment.
Solar Eclipses dangerous ?
eclipses are not in the least bit dangerous if observed with proper
care. Normally, one cannot look directly at the Sun because it is too
bright. But during an eclipse, just before and after totality, it is
possible to look directly at the sun without immediate discomfort and
this is where the danger lies. You can damage your eyes without knowing
it. It is essential to use a safe viewing filter to observe the eclipse
as the filter drastically cuts down the strength of the sun’s
rays to safe limits. Reduction of the sun’s intensity by factor
of 10,000 is recommended. This filter reduces the intensity by a factor
are the facts about eclipses in history ?
the date of each eclipse, the has occurred and will occur in the next
few thousand years can be calculated with great accuracy, events from
many ancient chronicles and annuals where eclipse are mentioned can
be dated with same precision. Records of eclipses were maintained from
ancient times in Mesopotamia, Assyria, Greece, Egypt, China, and India.
One of the most famous of these references in Herodotus account of a
battle between the Lydians and the Medes which went on for several years
until a total solar eclipse occurred. Taking this as signal from the
gods, the combatants Laid down their arms and made peace. That event
occurred on 28 may 585 BC.
Why are there myths about eclipses ?
have always left a deep impression on beholders, for the loss of the
sun- the source of life, was considered a bad omen. For centuries, priests
of ancient civilizations in Mesopotamia, Egypt, Greece and India kept
the knowledge of eclipses to themselves. Because they could frighten
the people into believing that they had power to cause eclipses at will.
People were made to fear eclipses and to make sacrifices to guard against