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Which lens has both the surfaces as conc...

Which lens has both the surfaces as concave

A

bi-convex

B

bi-concave

C

plano-convex

D

plano-concave

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Which lens has both the surfaces as concave?", we can follow these steps: ### Step 1: Understand the types of lenses Lenses can be classified based on the shape of their surfaces. The primary types include: 1. **Biconvex Lens**: Both surfaces are convex. 2. **Biconcave Lens**: Both surfaces are concave. 3. **Pleno-convex Lens**: One surface is plane and the other is convex. 4. **Pleno-concave Lens**: One surface is plane and the other is concave. ### Step 2: Analyze the options Now, we will analyze each option given in the question: - **Biconvex Lens**: Both surfaces are convex. (Not the answer) - **Biconcave Lens**: Both surfaces are concave. (This is a potential answer) - **Pleno-convex Lens**: One surface is plane and the other is convex. (Not the answer) - **Pleno-concave Lens**: One surface is plane and the other is concave. (Not the answer) ### Step 3: Identify the correct answer From the analysis, the only lens that has both surfaces as concave is the **Biconcave Lens**. ### Conclusion Thus, the answer to the question is **Biconcave Lens**. ---
To solve the question "Which lens has both the surfaces as concave?", we can follow these steps: ### Step 1: Understand the types of lenses Lenses can be classified based on the shape of their surfaces. The primary types include: 1. **Biconvex Lens**: Both surfaces are convex. 2. **Biconcave Lens**: Both surfaces are concave. 3. **Pleno-convex Lens**: One surface is plane and the other is convex. 4. **Pleno-concave Lens**: One surface is plane and the other is concave. ...
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