A converging lens has a focal length of 29.2 cm. (a) Locate the object if a real

Question

A converging lens has a focal length of 29.2 cm. (a) Locate the object if a real image is located at a distance from the lens of 116.8 cm. distance cm location (b) Locate the object if a real image is located at a distance from the lens of 204.4 cm. distance cm location (c) Locate the object if a virtual image is located at a distance from the lens of -116.8 cm. distance cm location (d) Locate the object if a virtual image is located at a distance from the lens of -204.4 cm. distance cm location

Explanation / Answer

Apply 1/f = 1/p + 1/q

Part A)

1/29.2 = 1/p + 1/116.8

p = 38.93 cm

Part B)

1/29.2 = 1/p + 1/204.4

p = 34.1 cm

Part C)

1/29.2 = 1/p + 1/-116.8

p = 23.36 cm

Part D)

1/29.2 = 1/p + 1/-204.4

p = 25.55 cm

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