Question

on what factors size of umbra and penumbra depends​

Answer 1

HEY MATE HERE IS YOUR ANSWER

1. IT DEPENDS UPON THE SIZE OF THE SOURCE OF LIGHT
2. IT DEPENDS UPON THE OBJECT IT MUST BE OPAQUE OBJECT TO FORM UMBRA
3. IT DEPENDS UPON THE SIZE OF THE OBJECT
4. IT DEPENDS UPON THE SCREEN THAT RECIVES LIGHT

HOPE IT HELPED YOU (◍•ᴗ•◍)❤

Answer 2

Answer:

Umbra

The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object. Assuming no diffraction, for a collimated beam (such as a point source) of light, only the umbra is cast.

Penumbra

There still remains a penumbra where the dose changes rapidly in the region near the edge of a radiation beam, although it is short in width. It is suggested that the width of the penumbra depends on the source size, distance from source to diaphragm, source to skin distance, and depth in tissue.

Explanation:

The size of a shadow depends on the distance between the light source and the object that blocks that light source AND the size of the object. If you have two people standing side-by-side outside on a sunny day, the distance to the sun is the same for both people.

Comments:

Hi Rishabh. I hope it helped you. I am most helpful in Science. Have a good day. :-) ●●

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