Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

A A lensmaker wants to make a magnifying glass from glasswith $n=1.55$ and with a focal length of 20.0 $\mathrm{cm} .$ If the twosurfaces of the lens are to have equal radii, what should thatradius be?

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

the radius of curvature of the lens is 22.0 $\mathrm{cm} .$

Physics 102 Electricity and Magnetism

Physics 103

Chapter 24

Geometric Optics

Electromagnetic Waves

Reflection and Refraction of Light

Rutgers, The State University of New Jersey

University of Washington

Hope College

University of Winnipeg

Lectures

02:30

In optics, ray optics is a geometric optics method that uses ray tracing to model the propagation of light through an optical system. As in all geometric optics methods, the ray optics model assumes that light travels in straight lines and that the index of refraction of the optical material remains constant throughout the system.

10:00

In optics, reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. Reflection may also be referred to as "mirror image" or "specular reflection". Refraction is the change in direction of a wave due to a change in its speed. The refractive index of a material is a measure of its ability to change the direction of a wave. A material with a higher refractive index will change the direction of a wave to a greater degree than a material with a lower refractive index. When a wave crosses the boundary between two materials with different refractive indices, part of the wave is refracted; that is, it changes direction. The ratio of the speeds of propagation of the two waves determines the angle of refraction, which is the angle between the direction of the incident and the refractive rays.

02:48

A lensmaker wants to make …

04:21

02:23

A lensmaker wants t0 make …

01:58

A magnifying glass has a c…

02:22

You're writing specif…

01:59

01:22

(II) A symmetric double co…

01:49

A convex lens of focal len…

02:12

Double-convex lenses are t…

01:36

A magnifying glass has a m…

03:28

A refracting astronomical …

00:56

00:42

(I) A double concave lens …

okay. Were total lens maker it? Let's make magnifying glass the glass that he's using. He or she is using as 1.55 Probably a corporation that's really doing it. Um, they're using, um, in the focal length is 20 centimeters. So f is he cool toe 20 70 meters. And they have to be quite ready. I What should the radius be? So we could just use one over our equals and minus one times one over R minus one over R. So they have to be equal and opposite, since this could be won over our plus one over r and, um so So it's gonna be too over, are so won over f equals and minus one times two over our cross multiply. Then you get that our is equal to and minus one times two over. So let's see. It's 0.55 times two. So that's 1.1 divided by 20. So 1.1 divided by 20 Oh, um oh, sorry. It's multiplied by my Bring that. Come on, Answer. That seemed a little crazy. Oh, maybe I can actually do that on my head. So 1.1 times f um, so that would be 22. I can't do that in my head. Aah! So 22 centimeters

View More Answers From This Book

Find Another Textbook

04:04

PartAIf the voltage amplitude across an 8.50-nF capacitor is equal to 12…

01:34

If a petrol engine takes in 1OkJ of energy in the form of petrol and does 2k…

03:15

Question 13 un0ui Wcque" qul Tne figure below shows uniform beam of len…

05:14

circular orbit at location where the An artificial satellite circles the Ear…

Consider the conducting spheres labeled A; B; and C shown in the drawing The…

03:36

wrecking ball, with mass of 315 kg, hangs from crane 10.0 m of cable the cra…

Not yet ansThe reason Heath was late getting back to his office to start…

05:56

A 150-Ib block rests on a horizontal floor. The coefficient of friction betw…

03:43

20) For the graph shown in the figure, what physical quantity does the slope…

05:08

The Enterprise amusement park ride spins in a vertical circle. It has a radi…