For a concave mirror,if the object distance u | vedclass

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(B) According to the mirror formula,$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$.Given that the object is at infinity,$u = \infty$.Substituting this into

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$f$

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(B) According to the mirror formula,$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$.Given that the object is at infinity,$u = \infty$.Substituting this into the formula: $\frac{1}{v} + \frac{1}{\infty} = \frac{1}{f}$.Since $\frac{1}{\infty} = 0$,we get $\frac{1}{v} + 0 = \frac{1}{f}$.Therefore,$v = f$.When an object is placed at infinity in front of a concave mirror,the rays of light are parallel to the principal axis,and the image is formed at the principal focus $(F)$.

For a concave mirror,if the object distance $u = \infty$,then the image distance $v = ..........$.

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