Question

The radius of lens of curvature of a convex lens is 10 m The power of lens will be​

Answer 1

Answer:

The radius of curvature of the plane surface of a Plano-convex lens is infinite.

Let are the radius of curvature of the convex surface and plane surface of the planoconvex lens. The focal length of the lens [f] = 30 cm.

P=

f

1

⇒f=

P

1

f=

10

1

m=

10

100cm

=10cm

Now

f

1

=(μ−1)(

R

1

1

−

R

2

1

)

=

10

1

=(μ−1)(

10

1

−(−

10

1

))

⇒

10

1

=(μ−1)

10

2

⇒μ−1=

2

1

⇒μ=1+

2

1

=

2

3

Explanation:

Answer 2

Answer:

0.2 Dioptres

Explanation:

Focal Length = $\frac{1}{2}$Radius of Curvature

= $\frac{1}{2}$×10m

=5 m

Power = $\frac{1\\}{Focal Length}$

= $\frac{1}{5} Dioptres$

=0.2 D