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Telescopes Resolution - Degree to which fine detail can be distinguished Resolution - Degree to which fine detail can be distinguished Fundamentally an.

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Presentation on theme: "Telescopes Resolution - Degree to which fine detail can be distinguished Resolution - Degree to which fine detail can be distinguished Fundamentally an."— Presentation transcript:

1 Telescopes Resolution - Degree to which fine detail can be distinguished Resolution - Degree to which fine detail can be distinguished Fundamentally an issue of distinguishing angles Fundamentally an issue of distinguishing angles

2 Telescopes Resolution Power - Angle betwn two stars that can just be resolved Resolution Power - Angle betwn two stars that can just be resolved Images created by telescope have a size in at the focus that depends on the size of the objective lens or mirror Eye (5 mm) Small Telescope (5 cm) “Large” Telescope (15 cm)

3 Telescopes Resolution Power - Angle betwn two stars that can just be resolved Resolution Power - Angle betwn two stars that can just be resolved Small Telescope (5 cm)  Resolution (arcseconds) “Diffraction Limit” Diameter of Objective (cm) Wavelength (cm)

4 Telescopes Atmospheric Seeing - blurring due to atmospheric motions Atmospheric Seeing - blurring due to atmospheric motions - true limit of ground-based observations - true limit of ground-based observations

5 Telescopes Atmospheric Seeing - blurring due to atmospheric motions Atmospheric Seeing - blurring due to atmospheric motions - true limit of ground-based observations - true limit of ground-based observations 1 arcsec

6 Telescopes Atmospheric Seeing - blurring due to atmospheric motions Atmospheric Seeing - blurring due to atmospheric motions - true limit of ground-based resolution - true limit of ground-based resolution

7 Telescopes Atmospheric Seeing - blurring due to atmospheric motions Atmospheric Seeing - blurring due to atmospheric motions - true limit of ground-based observations - true limit of ground-based observations Palomar Hubble Space Telescope

8 Telescopes Resolution Power - Angle betwn two stars that can just be resolved Resolution Power - Angle betwn two stars that can just be resolved Small Telescope (5 cm)  Resolution (arcseconds) “Diffraction Limit” Diameter of Objective (cm) Wavelength (cm)

9 Telescopes Atmospheric Seeing - blurring due to atmospheric motions Atmospheric Seeing - blurring due to atmospheric motions - true limit of ground-based observations - true limit of ground-based observations

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