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define the principal focus of a convex mirror

it cn b..lik diss--wen d rays r ll to the principle ....in a convx mirrr..they ''appear''' 2 diverzz  4m a point..and d point is calld--principle focus...........

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what is "diverzz"?

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......the focus of a concave and convex both r same....

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The principle focus of a concex lens

  A ray is a parallel of the principle axis and at point the principle focus after passes through the convex lens. This phenomeno is called the principle focus of a covex lens.

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The reflected rays appear to come from a point on the principal axis. And this point is called the principal focus of the convex mirror.

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define focus of convex mirror i did not get a niceanswer

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The parallel rays reflect and appear to meet at a point on the principal axis. This point is called principal focus of convex mirror
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The principal focus of a convex mirror is the point on the principal Axis from which all the incident rays parallel to principal Axis appear to come after reflection from the convex mirror
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The principle focus of convex mirror is that point at which rays parallel to the principal axis appear to meet. I have used "appear to meet" because in case of convex mirror only virtual image is formed.
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The reflected rays appear to come from a point on the principal axis. This point is called the principal focus of the convex mirror.
 
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The focus of a convex mirror is a point on its principal Axis from which a beam of light appears to divert after being reflected from the convex mirror
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You have two lenses a and b of local length +10 & -10 respectively.State the nature and power of each lens.Which of the lenses will form a virtual and magnified image of an object placed 8cm from the lens?Draw a ray diagram to justify your answer
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The point on principal axis of a spherical mirror where the rays of light parallel to principal axis meet or appear to meet after reflection from a spherical mirror is called principal focus
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The point on which the reflected rays intersect on the principle axis is known as principle focus.
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