HELP ASAP PLS. Choose an optical instrument or a tool. Tell us the type of diffraction it uses. How it works and how diffraction makes this instrument/tool useful.
Drawing the path of light is mandatory for each instrument/tool you choose.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

the answer is 12 as i may remember

: )

the ima (higher than 1m) will be greater than the ima with the height of 1m.