Calculating Telescope Length: Refracting Telescopes

edoarad · May 10, 2009

in a refracting telescope, the lens's diameter is 1.02 m and its focal length is 19.4 m.
how long must the telescope be to get an image, 40 times bigger?

i would also like to get a link to a site explaining this kind of elementary optics.

edoarad · May 10, 2009

just saw the warning, please don't delete my posts :S they are in a close enough format i think..

Calculating Telescope Length: Refracting Telescopes

Discussion

A very simple moments question

Why does adiabatic compression use more energy than adiabatic expansion?

What force causes precession?

Simple kinematics problem — falling from a geostationary satellite

Why does a fan cool you in a sealed room if it adds heat?

Insights Revisiting the Velocity-Time Function

Insights Remote Operated Gate Control System

Insights AI Enriched Problem Solving

Insights Thinking Outside The Box Versus Knowing What’s In The Box

Insights Why Entangled Photon-Polarization Qubits Violate Bell’s Inequality

Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect

Calculating Telescope Length: Refracting Telescopes

Discussion

Similar threads

Stargazing Understanding the Field of View of Reflecting and Refracting Telescopes

Stargazing Problem in making a small refracting Telescope

Undergrad Condition for Centering Starlight in a Water-Filled Telescope?

Stargazing Calculating the Resolving power of a Telescope

Stargazing Viewing stars through a refracting telescope?

Undergrad Phase Contrast Telescope - Part II