An object is placed 10 cm from a diverging lens which forms an image 6.5 cm from the lens. What is the focal length of the lens?
An object is placed 10 cm from a diverging lens which forms an image 6.5 cm from the lens. What is the focal length of the lens?
Asked by RAHUL rd
| 22nd Nov, 2014,
10:33: PM
Expert Answer:
Given that:
The object distance,u = -10cm
The image distance ,v= -6.5 cm
Let f be the focal length of the lens.
According to lens formula we know that:
Given that it is a diverging lens ,i.e. concave lens.The focal length of a concave lens is - ve.
So the focal length of the lens =-18.6 cm
Answered by Jyothi Nair
| 22nd Nov, 2014,
11:59: PM
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