You are given 2 mirrors a and b of focal length +10 cm and -20 cm respectively. Which one will you use as a converging mirror and why
Answers
Answered by
2
Answer:-20 one
Explanation:
Because it's a concave mirror or converging mirror
As focal length is -ve it's concave mirror
And if focal length is +ve it's convex mirror
Just look for sign
Answered by
2
Answer:
We will use -20cm focal length mirror as a converging mirror
Explanation:
As -ve focal length indicates concave mirror
+ve focal length indicates convex mirror
Since concave mirror is used converging mirror.
Therefore answer is -20
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