# InClass .

32 views
Category: News / Events
Description
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
Transcripts
Slide 1

﻿Secondary School PHYSICS InClass by SSL Technologies with S. Lancione Exercise-54 Optical Power

Slide 2

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

Slide 3

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

Slide 4

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

Slide 5

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

Slide 6

EXERCISES

Slide 7

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

Slide 8

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

Slide 9

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

Slide 10

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

Slide 11

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

Slide 12

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

Slide 13

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

Slide 14

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

Slide 15

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

Slide 16

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

Slide 17

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

Slide 18

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

Slide 19

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

Slide 20

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

Slide 21

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

Slide 22

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

Slide 23

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

Slide 24

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

Slide 25

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

Slide 26

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

Slide 27

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

Slide 28

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

Slide 29

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

Slide 30

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

Slide 31

SSL Technologies.com/science The end

Recommended
View more...