Is the lens as such interesting?
One piece of glass with a special shape
Indeed, the world would be different without lenses. Maybe it wouldn't exist for us at all, because the eye also has a lens and vision is our main source of information. Lenses are also important in all kinds of cameras, many telescopes ...
Alustame läätsede, optiliste süsteemide, optilise peatelje ning läätsede keskpunktide defineerimisega.
Lenses and lens models
Learn the definitions of lenses and lens models. Answer the question.
Optical systems and optical principal axis
Find out how optical systems are assembled. Answer the questions.
Uurime poolketta kujulist läätse mudelit. Võrdleme seda meie antud läätse definitsiooniga.
The lens model focuses light from a point light source
Verify in an experiment that the half-disk-shaped lens model can focus the light from a point light source. Answer the questions.
Focal length and optical power of the lens model
Verify in the experiment that the half-disk-shaped lens model meets the definition of a lens given by us and measure its focal length. Answer the questions.
Kordame läätse mudelitega tehtud katseseeriat ka läätsedega.
A converging lens focuses the light from a point light source.
Verify in an experiment that a converging lens can focus the light from a point light source. Answer the questions.
Focal length and optical power of a converging lens
Verify in the experiment that the converging lens meets the definition of a lens given by us and measure its focal length. Answer the questions.
Lõpuks hajutava läätse mudel.
Focus of a diverging lens
Measure the focal length of the concave lens model. Answer the question.
Compound lenses formed from lens models
Form lens systems from the two models in the set: a convex lens model and a concave lens model. Answer the questions.
Focal length of a compound lens formed from convex lenses
In the experiment, measure the focal length of a compound lens formed from two convex lenses and compare it with the calculated one.
Knowledge test: lenses and optical systems
Check your knowledge and understanding by answering the questions.
Lenses and optical systems: important phrases
Here are some important phrases that you can take away from this lesson to understand.