A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in Fig.16.2 as A, B, C and D. In which position mirror will be visible? 

Dear Student ,
Here in this case the mirror will be visible in case of position A , as hence the reflected ray after reflection from the mirror will directly pass through the eye .

Hope this helps you to understand this .
Regards

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