umbra and penumbra means ?
you are a blink
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yes I am a BLINK
Explanation:
Umbra means ''shadow'' while ''penumbra'' means to hang on the shadow or almost a shadow. ... When a partial lunar eclipse occurs, the umbra merely covers a part of the moon. The outer shadow of the earth falls on the moon during a penumbral lunar eclipse.
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Yup, I am a blink...
A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries.
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