A person has a near point of np 85 cm and a far point of, Ask an Expert

Academics

A person has a near point of NP = 85 cm and a far point of FP = 210 cm. The person wishes to obtain a pair of bifocal eyeglasses to correct these vision problems. The glasses will sit a distance d = 2.1 cm from the eyes.

Part (a) Write a formula for the power, P1, of the upper portion of the bifocals, in terms of the given quantities, that will enable the person to see distant objects clearly.

Part (b) Calculate the power, P1, of the upper portion of the bifocals in units of diopters.

Part (c) Write a formula for the power, P2, of the lower portion of the bifocals, in terms of given quantities, so that the person canclearly see objects that are located a distance N from his eyes.

Part (d) Calculate the power, P2, of the lower portion of the bifocals in units of diopters. Use N = 25 cm, which is for normal human vision.

View complete question

Physics, Academics

Category:- Physics
Reference No.:- M9856342

Have any Question?Write your Review or question?

Related Questions in Physics

Please help with this problemssuppose you walk 16m

Please help with this problems: Suppose you walk 16m straight west and then 22.5m straight north. How far are you in meters from your starting point (numeric value only, no expression)? What is the compass direction, in ...

Questionnbspthe three 250g masses are connected by massless

Question: The three 250g masses are connected by massless, rigid rods. What is the triangle's moment of inertia about the axis through the center? What is the triangle's kinetic energy if it rotates about the axis at 6. ...

Question the parking brake on a 2400kg cadillac has failed

Question: The parking brake on a 2400kg Cadillac has failed. and it is rolling slowly, at 1.2mph, toward a group of small children. Seeing the situation, you realize you have just enough time to drive your 1000kg Volkswa ...

Question a skier is accelerating down a 300 degree hill at

Question: A skier is accelerating down a 30.0 degree hill at 1.80 m/s2. What is the vertical component of her acceleration? How long will it take her to reach the bottom of the hill, assuming she starts from rest and acc ...

Question people have proposed driving motors with the

Question: People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques. Suppos ...

Question a real image is four times as far from a lens as

Question: A real image is four times as far from a lens as is theobject. What is the object distance, measured in focal lengths? ____from the lens The response must be typed, single spaced, must be in times new roman fon ...

Question part a how much time does it take light to travel

Question: Part A: How much time does it take light to travel from the moon to the earth, a distance of 384000 km ? Express your answer in seconds to three significant figures. Part B: Light from the star Sirius takes 8.6 ...

Question a point charge of magnitude q is at the center of

question: A point charge of magnitude q is at the center of a cube with sides of length L. Part A: What is the electric flux ? through each of the six faces of the cube? Use 0 for the permittivity of free space. and Part ...

As part of a fiendish plan the physics student society

As part of a fiendish plan, the physics student society decided to use a catapult to launch a water balloon toward the engineering quad. The catapult launches the balloon ( m =4.24 kg) with an initial speed of v 0=18.2 ...

Question a supply plane needs to drop a package of food to

Question: A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane flies 88m above the glacier at a speed of 150m/s. How far short of the target should it drop the package ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Physics Expert