A thin lens has a focal length of 25.0 cm. (a) Locate the image when the object

Question

A thin lens has a focal length of 25.0 cm.

(a) Locate the image when the object is placed 26.1 cm in front of the lens. (Enter a negative distance if the image is in front of the lens.)
cm from the lens Choose the correct description of the image. (Select all that apply.)

invertedenlargedvirtualrealreducedupright

(b) Locate the image when an object is placed 23.6 cm in front of the lens. (Enter a negative distance if the image is in front of the lens.
cm from the lens Choose the correct description of the image. (Select all that apply.)enlargedinverteduprightreducedrealvirtual

Explanation / Answer

Here ,

f = 25 cm

a)

for do = 26.1 cm

using lens formula

1/f = 1/di + 1/do

1/25 = 1/26.1 + 1/di

di = 593.2 cm

the image is located at 593.2 cm

and as di is positive and greater than do , the image is Real , inverted and enlarged

B)

for di = 23.6 cm

1/25 = 1/di + 1/23.6

di = -421.4 cm

the image is formed at -421.4 cm

as di is negative and greater than do , the image is virtual , upright and enlarged

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.