What is the nature and focal length of the lens If the power of a lens is -0-1 D -A- image size -4 cm- image distance -10 cmB- image size -10 cm- image distance -4 cmC- image size -4 cm- image distance -10 cmD- image size -4 cm- image distance -5 cm

The correct option is D image size = 4 cm, image distance = 5 cm Power of lens P = +0.1 D P = 1/f ⇒ f = 10 cm,where f is the focal length of the lens Since, f ...

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What is the nature and focal length of the lens If the power of a lens is $+ 0.1 D$ ?

image size = 4 cm, image distance = – 10 cm

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image size = 10 cm, image distance = – 4 cm

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image size = 4 cm, image distance = 10 cm

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image size = 4 cm, image distance = 5 cm

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Solution

The correct option is D
image size = 4 cm, image distance = 5 cm

Power of lens P = +0.1 D
$P$ = $\frac{1}{f}$ ⇒ $f = 10 c m$ ,where f is the focal length of the lens
Since, focal length is positive, lens will be convex or diverging.

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Q. Image of an object at infinity is formed by a convex lens of focal length

30 c m

such that the size of the image is

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. If a concave lens of focal length

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What is the nature and focal length of the lens If the power of a lens is + 0.1 D?

The correct option is D image size = 4 cm, image distance = 5 cm Power of lens P = +0.1 D P = 1f ⇒ f=10 cm,where f is the focal length of the lens Since, focal length is positive, lens will be convex or diverging.

What is the nature and focal length of the lens If the power of a lens is $+ 0.1 D$ ?

The correct option is D
image size = 4 cm, image distance = 5 cm

Power of lens P = +0.1 D
$P$ = $\frac{1}{f}$ ⇒ $f = 10 c m$ ,where f is the focal length of the lens
Since, focal length is positive, lens will be convex or diverging.