_and_ are the different parts of shadows created by any light source after being partially obstructed by an opaque object.

Frequency and wavelength

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Umbra and Penumbra

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Umbra and Ultraumbra

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Solar and Lunar

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Solution

The correct option is B
Umbra and Penumbra

The most central and darkest part of a shadow is called an umbra. If you aim a light source directly at an object, the blackest portion of the shadow directly behind the object is the umbra of the shadow. Penumbra refers to the lighter shading that hangs around the umbra.

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Similar questions

Write answers the following questions.

(a) Why does an object cast a shadow on a screen?

(b) What is the connection between the formation of shadows and the propagation of light?

(d) When does a solar eclipse take place?

If part of the full moon passes through Earth's umbra, we will see a(n)

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