Optical telescopes – basic principles
How it works
Optical telescopes are instruments that collect and bundle visible light in order to observe distant objects such as stars and planets. There are mainly two types: lens telescopes (refractors) use lenses to refract and bundle the light, while mirror telescopes (reflectors) use mirrors to reflect and focus the light. The magnification of a telescope depends on the ratio of the focal lengths of the objective and the eyepiece. The light-gathering power of a telescope increases with the square of the diameter of the objective lens. Telescopes help make faint and distant celestial bodies visible and to see more details than with the naked eye.
Optical telescopes collect and bundle light with lenses or mirrors so that distant objects appear larger and more details become visible; the design and the diameter of the objective determine their performance.
An example
Which part of a lens telescope bundles the light from distant stars?
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50 Exercises · three difficulty levels · selection and number input
To the learning unit →Own explanation and own practice exercises by AmyMath. Subject reference framework: KMK Educational Standards Mathematics ESA/MSA. The topic assignment may vary by federal state.