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Click. Optical Power. The optical force of a lens is a measure of how much the lensbends light. The more prominent the optical force, the more the lensbends light.Note that the optical force is the corresponding of the central lengthof the lens. The image for the optical force of a lens is P andthe unit for the optical force is dioptres and is assigned bythe Greek image
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Secondary School PHYSICS InClass by SSL Technologies with S. Lancione Exercise-54 Optical Power

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Optical Power The optical force of a focal point is a measure of how much the focal point twists light. The more noteworthy the optical power, the more the focal point twists light. Take note of that the optical power is the corresponding of the central length of the focal point. The image for the optical force of a focal point is P and the unit for the optical power is dioptres and is assigned by the Greek image "  " . Additional bowing Less bowing High optical power Low optical power Click

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Optical Power The optical force of a focal point is the corresponding of its central length. Concentrate these illustrations: f = 1 cm P = 1/0.01 m = 100  f = 2 cm P = 1/0.02 m = 50  f = 4 cm P = 1/0.04 m = 25  f = 8 cm P = 1/0.08 m = 12.5  f = 10 cm P = 1/0.1 m = 10  f = 25 cm P = 1/0.25 m = 4  f = 50 cm P = 1/0.50 m = 2  f = 100 cm P = 1/1 m = 1  Note that the optical force of a focalizing focal point is sure and for a wandering focal point it is negative. Click

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Remember this! The optical force of a curved (or uniting) focal point is sure. The optical force of a sunken (or separating) focal point is negative. Click delay

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Optical Power at least two focal points might be consolidated to shape a compound focal point or an optical framework . For such a compound focal point, the aggregate optical power is given by the accompanying recipe: Click

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EXERCISES

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Question-1 Define the optical force of a focal point. The capacity of a focal point to twist (meet or wander) light beams. Click

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Question-2 What kind of a focal point has positive optical power? Merging focal point. Click

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Question-3 What kind of a focal point has a negative optical power? Separating focal point. Click

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Question-4 Listed beneath are the central lengths of five focal points. Decide their optical forces. a) f = 1 cm Click

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Question-4 Listed underneath are the central lengths of five focal points. Decide their optical forces. b) f = 5 cm Click

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Question-4 Listed underneath are the central lengths of five focal points. Decide their optical forces. c) f = 10 cm Click

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Question-4 Note that the negative sign shows a wandering focal point. Recorded beneath are the central lengths of five focal points. Decide their optical forces. d) f = - 20 cm Click

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Question-4 Listed underneath are the central lengths of five focal points. Decide their optical forces. e) f = 15 cm Click

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Question-5 Listed beneath are the optical forces of four focal points. Decide their central lengths. a) P = 20  Click

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Question-5 Listed underneath are the optical forces of four focal points. Decide their central lengths. b) P = 10  Click

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Question-5 Listed beneath are the optical forces of four focal points. Decide their central lengths. c) P = - 25  Note that the negative sign demonstrates a separating focal point. Click

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Question-5 Listed underneath are the optical forces of four focal points. Decide their central lengths. d) P = 8  Click

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Question-6 A focalizing focal point has a central length of 25 cm. Decide its optical power. Click

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Question-7 Note that veering focal point has a negative optical power. The optical force of a separating focal point is – 8.33  . Decide its central length. Click

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Question-8 Draw the beams rising up out of a focal point having the accompanying optical forces: 5 cm a) P = 20  Click

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Question-8 Draw the beams rising up out of a focal point having the accompanying optical forces: 25 cm b) P = 4  Click

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Question-8 Draw the beams rising up out of a focal point having the accompanying optical forces: c) P = - 20  5 cm REMINDER By tradition in utilizing focal points, separations are certain as an afterthought where light turns out. F Click

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Question-8 Draw the beams rising up out of a focal point having the accompanying optical forces: d) P = - 4  25 cm F Click

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Question-9 Two thin focal points are set together to frame a viable focal point framework. The focal points have optical forces of 20.0  and –12.0  individually. Locate the central length of the framework. Click

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Question-10 The negative sign demonstrates the framework is going about as a veering (sunken) focal point. A focal point framework comprises of a merging focal point and a veering focal point. The central length of the uniting focal point is 60 cm. In the event that the optical force of the framework is to be 1.25  , what ought to be the central length of the wandering focal point? Click

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Question-11 Convert to meters An optical framework is made utilizing two thin focal points set near each other. The optical force of the framework is 4 δ (dioptres). Realizing that one of the focal points has a central length of - 16 cm, decide the optical force of the second focal point. Update The unit for length in the optical power recipe must be meters. A) 13.5 δ B) 10.3 δ C) 9.6 δ D) 3.4 δ E) - 2.9 δ Click

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Question-12 Convert to meters. Three focal points have central lengths of 10.5 cm, - 7.5 cm and 5 cm separately. The focal points are joined to frame an optical framework. Decide the optical force of this focal point framework. A) 0.08 δ B) 0.23 δ C) 2.70 δ D) 16 δ E) 43 δ Click

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Question-13 120 cm Object Negative sign demonstrates reversal Two focal points are put together to frame an optical framework. One focal point has a central length of 20.0 cm while alternate focal point has a central length of - 35.0 cm. In the event that a question 4.0 cm tall is put 120 cm before the framework decide the qualities of the picture. Given Calculation of f T Calculation of d i Calculation of h i Click

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Question-14 Convert 25 cm to meters The central length of a focal point framework is 25 cm. What is the optical force of this framework? A) 4.0  B) - 4.0  C) 0.04  D) - 0.04  E) 0.25  Click

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