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Assertion : Goggles have zero power.
Reason : Radius of curvature of both sides of lens is same
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Reason : Radius of curvature of both sides of lens is same
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If both assertion and reason are true and reason is the correct explanation of assertion
The focal length is given by \(\frac{1}{f}=(\mu-1)\left(\frac{1}{R_1}-\frac{1}{R_2}\right)\). For goggle lenses, both sides are curved the same way. \(R_1\) and \(R_2\) are positive. If they are the same, \(\frac{1}{f}=0\) i.e. power is zero.
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