a concave lense of focal length 15 cm from an image 10 cm from the lens .how far is an object is placed from the lens ? draw a ray diagrams
Answers
Answered by
6
Focal length of concave lens (OF1), f = −15 cm
Image distance, v = −10 cm
According to the lens formula,
Given f = -15 cm. v= -10 cm, u = ?
Lens formula 1/f = 1/v- 1/u
1/-15 = 1/-10 - 1/u
1/u = -1/10 + 1/15 = -3 +2 /30 = -1/30
u = -30 cm
So the object should be placed 30 cm from the lens.
ok friend give me brainly tag .
Image distance, v = −10 cm
According to the lens formula,
Given f = -15 cm. v= -10 cm, u = ?
Lens formula 1/f = 1/v- 1/u
1/-15 = 1/-10 - 1/u
1/u = -1/10 + 1/15 = -3 +2 /30 = -1/30
u = -30 cm
So the object should be placed 30 cm from the lens.
ok friend give me brainly tag .
Similar questions