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Please answer all short answer questions!


1. What value does the image distance approach as the object distance becomes larger?

2. What value does the object distance approach as the image distance becomes larger?


3. What is the relationship between image distance and object distance? (Directly related or inversely related?) Give evidence supporting your answer.
4. Where would you place the object to obtain an image as far away from the lens as possible?

5. Where would you place the object to obtain an image located at the focal length of the lens ?

6. Using your answer from above and your experiences in this activity, explain why ”fixed lens” cameras require that the subject of the photo be a minimum distance from the lens.

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Sumant
SumantLv10
24 Mar 2021

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

does anyone know how to do part B,C and C to this problem?anythingwould help.


For a finite continuous charged object we can use integration tofind the electric potential at a point. As is the case for anyfinite charge distribution, the value of the electric potential canbe chosen to be zero at any reference point which is sufficientlyfar from the distribution. I.e. One can (and usually does) chooseV_(infinity) = 0 at r = infinity.

Consider a rod of length L extending from the origin along thepositive x axis, and a point P located at x = -D, which is adistance D from the origin. The task is to find the electricpotential (voltage) at the point P.

ChargedRod

The above Figure shows the rod. Highlighted is one small piece ofthe rod which is located at a position x and has length (dx). Note:In answers below, if you want to include dx, it is good practice toput (dx) in parentheses.

(a) Suppose that the rod is uniformly charged to a value Q. Writethe expression for the linear charge density, using the symbolsalready defined.
lambda = 1Click here to preview your answer.

(b) The small piece of the rod has length dx. In terms of symbolsL, x, (dx), D, Q and constants, what is the infinitesimal charge onthe rod? You may need to enclose dx in parentheses for it todisplay properly.
dq = 2Click here to preview your answer.

c) What is the distance from the point to the small piece of therod? Answer in terms of symbols x, L, D, (dx) and constants.
3Click here to preview your answer.

(d) What is the infinitesimal voltage produced at point P from thisdq? Answer in terms of symbols k, Q, x, L, D, (dx) andconstants.
dV = 4Click here to preview your answer.

(e) The final step would be to integrate this result. What are thelower 5Click here to preview your answer.
and upper 6Click here to preview your answer. limits on theintegration? Answer in terms of symbols x, L, D, (dx) andconstants.

Note that if the charge of the rod had not been uniform, we wouldneed to know lambda as a function of x and use that in place of(Q/L).

You are a student in a science class that is using the followingapparatus to determine the value of g. Two photogates are used.(Note: You may be familiar with photogates in everyday living. Yousee them in the doorways of some stores. They are designed to ringa bell when someone interrupts the beam while walking through thedoor.) One photogate is located at the edge of a 1.00-m-high tableand the second photogate is located on the floor directly below thefirst photogate. You are told to drop a marble through these gates,releasing it from rest at the same height as the table. The uppergate starts a timer as the ball passes through it. The secondphotogate stops the timer when the ball passes through itsbeam.
(a) Prove that the experimental magnitude of free-fall accelerationis given by gexp = (2(Delta)y)/(delta)t)^2, where (delta)y is thevertical distance between the photogates and ?t is the fall time.(Do this on paper. Your instructor may ask you to turn in thiswork.)

(b) For your setup, what value of (delta symbol)t would you expectto measure, assuming gexp is the standard value (9.81 m/s2)?(Answer in seconds)


(c) During the experiment, a slight error is made. Instead oflocating the first photogate even with the top of the table, yournot-so-careful lab partner locates it 0.50 cm lower than the top ofthe table. However, she does manage to properly locate the secondphotogate on the floor directly below the first. What value of gexpwill you and your partner determine? (Answer in m/s^2)


What percentage difference does this represent from the standardvalue of g?

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