Question

Differentiate between umbra and penumbra.​

Answer 1

Answer:

photosynthesis

ˌफ़ोटोˈसिन्‌थ़सिस्‌

noun

the process by which green plants turn carbon dioxide and water into food using energy from sunlight

सूर्य के प्रकाश से हरे पौधों द्वारा कार्बन डाइ-ऑक्‍साइड और जल को भोजन का रूप देने की प्रक्रिया; प्रकाश-संश्‍लेषण; फ़ोटोसिंथीसिस

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Answer 2

In physics, the umbra refers to the darkest part of the shadow. 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. In astronomy, if the sun is shining directly on the western hemisphere of the earth, the eastern hemisphere is bathed in darkness, and objects behind the earth (such as the moon or other planets) are in the earth’s umbra.Penumbra refers to the lighter shading that hangs on the outskirts of the umbra. The penumbra is not a true shadow. The Lighting Design and Simulation Knowledgebase describes the penumbra as a gradient: The shading gradually lessens from shadow to light as the penumbra stretches away from the umbra.