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    Strayer,Phoniex,
    Feb-1999 - Mar-2006

  • MBA.Graduate Psychology,PHD in HRM
    Strayer,Phoniex,University of California
    Feb-1999 - Mar-2006

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Category > Math Posted 23 Aug 2017 My Price 8.00

focal length

Discussion question

In photography fixed focal length means that the focal length is not adjustable. Photographers are unable to zoom in and out on a particular subject when using such a lens. Not being able to easily zoom in on a subject might seem like a huge disadvantage. But such lenses are credited with being able to produce much higher quality pictures in controlled settings.

In order for a film camera with a fixed focal length F to focus on an object located a distance x from the lens, the film must be placed a distance y behind the lens. F, y, and x are related as follows

 

Now suppose a camera has a lens with focal length F = 65.

1.    Explain what happens to the focusing distance y as the object moves far away from the lens.

2.    Explain what happens to the focusing distance y as the object moves closer and closer to the lens.

3.    In general, why is it not possible to cross a vertical asymptote?


My Answer

F is the focal length// x be the object distance// y is the distance

When object moves far away from lens

x→∞

1/x→0

1/65 = 0 + 1/y

y = 65

When object moves closer and closer to the object

x→0

1/x→∞

It is not possible to cross a vertical asymptotes because y is not defined.

Starting at “F is the focal length” and ending with “because y is not defined” is my answer. Below are some questions my instructor asked me to re answer concerning the answers I gave. Could someone please help me answer my instructors re questions please.

1.Describe the impact on y when x in increased

2.Describe the impact on y when x is decreased

3.What is meant by the following: “It is not possible to cross a vertical asmptotes because y is not defined.”


 

Answers

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Status NEW Posted 23 Aug 2017 08:08 AM My Price 8.00

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