(a) Find the object distance (in terms of f ) for a thin converging lens of foca

Question

(a) Find the object distance (in terms of f) for a thin converging lens of focal length f if the image is real and the image distance is six times the focal length. (Use any variable or symbol stated above as necessary. Enter your coefficient to two decimal places.)
p =  

(b) Find the object distance (in terms of f) for a thin converging lens of focal length f if the image is virtual and the absolute value of the image distance is four times the focal length. (Use any variable or symbol stated above as necessary. Enter your coefficient to two decimal places.)
p =  

(c) Calculate the magnification of the lens for case (a).


Calculate the magnification of the lens for case (b).

Explanation / Answer

a)

q = 6f

1/p + 1/q = 1/f

1/p + 1/6f = 1/f

1/p = 5/6f

p = 6f/5 = 1.2 f

b) q = -4f

1/p - 1/4f = 1/f

1/p = 5/4f

p = 4f/5 = 0.8f

c)

m = q/p = 5

d)

m = p/q = 5

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