which resembles a plano-convex lens," wrote the team in its published paper. "We vary the size and curvature of the droplets by changing the droplet volume, resulting in a variable focusing effect." ...

I picked up a benchtop injection molding machine to play with, and thought a "simple" double convex singlet lens would be a good first project. Coast Guard to remove 100+ buoys from Maine waters ...

Save guides, add subjects and pick up where you left off with your BBC account. Convex and concave lenses can both be used to correct defects of vision. The most commonly occurring defects of ...