Question

find the power of a concave lens of focal length of 10 m and draw a labelled diagram to show the focus of a concave lens

Answer 1

Answer:

Given and find:

• Find the power of a concave lens of focal length of 10 m.

We know that:

★ Formula:

→ ${\sf{\underline{\boxed{\orange{\sf{Power = \dfrac{1}{Focal \: length} }}}}}}$

Calculations:

→ $\sf{Power = \dfrac{1}{10}}$

→ ${\sf{\underline{\boxed{\pink{\sf{Power = 0.1}}}}}}$

Therefore, 0.1 is the power of concave lens.

• Refer the attachment for the diagram.

Related topics:

1) Mirror formula:

2) Mirror equation:

3) Concave mirror:

4) Convex mirror:

5) Leans equation:

6) Magnification equation:

Related formula:

• 1/f = 1/v + 1/u
• 1/do + 1/di = 1/f

• There are many other important formula and related topic too :-)

Answer 2

Answer:

p=1/f

p=1/10m=0.1D

Explanation:

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