As you saw in class, convex and concave lenses behave in different ways. In our new formal lab, you will determine exactly how this happens.
Prior to this, research this question - what exactly is a focal point, and how is it different for a convex lens vs. a concave lens.
In the lab, you will be moving an object (candle) and seeing how images form (if indeed they do) - are they larger/smaller/same, real/virtual (look this up, too), upside-down or right-side up.
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