Question

the midpoint of the line joining the poles and optical centre of the lens is _________

PLZ TELL ONE WORD ANSWER
IT IS A BLANK
NOT A HUGE ANSWER​

Answer 1

Answer:

focal length is the midpoint of the line joining the poles and optical centre of the lens

Answer 2

The midpoint of the ‘line joining the poles’ and optical centre of the lens is the equator of the lens.

Explanation:  

• A lens is a transparent material which is used to either reflect or refract the rays of light. Now the poles of the lens is the end of the lens.  

• The ‘distance’ between the two ends of the lens is known as the aperture of the lens. If we draw an imaginary line between the ‘optical centre’ and the poles, it is known as the equator of the lens.  

• The ‘equator of the lens’ is the centre of the ‘Thickness of the lens’.  

Learn more about poles

Chromosomes move to the respective poles due to the contraction of ________.

a) interzonal fibres

b) chromosomal fibres

c) inter-polar fibres

d) astral rays

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