Question

Hiii guys!!!

Tell me the answer plzz....!

Answer 1

Answer:

hi sis !!

its so easy I'LL tell you

as to the figure

1. 11 ,7 , 8 = 13

2. 11 , 10 , 3 = 12

3. 14 , 6 , 16 = 18

4. 5 , 7 ,4 = ?

as to the first ->

11 + 7 + 8 / 2

26 / 2 = 13

second ->

11 + 10 + 3 / 2

24 / 2 = 12

third ->

14 + 6 + 16 / 2

36 / 2 = 18

therefore forth ->

5 + 7 + 4 / 2

16 / 2 = 8

Answer 2

Answer:

The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light.

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