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Geometric Optics #2
Shadows, Pinhole Cameras, Prisms
| Question | Answer |
|---|---|
| What is umbra? | Latin word for shade; another work for shadow |
| What is penumbra? | Latins word meaning almost a shade |
| What does eclipse mean? | Greek work for failure to appear. |
| In a pinhole camera the smaller the hole, the _______ the image. | Sharper |
| Where does the word image come from? | The Latin word Imaga, which means imitation |
| Images are ________, so they appear upside down? | Inverted |
| What is a prism? | An optical medium with non-parallel sides? |
| Angles inside and outside the prism are usually not _____? | Equal |
| What are prisms used for? | changing the apparent positions of the object; altering the direction light travels; measuring and correcting phorias and trophias; reflecting light |
| The two refracting surfaces are referred to as.... | first and second surfaces, or front and back surfaces |
| What is the reflecting surface of a prism? | The second surface if the critical angle is exceeded |
| What is the apical angle? | The number of degrees between the first and second refracting surface. Referred to as (a) |
| The orientation of prisms is described according to it's? | Base Direction |
| Prisms bend light towards the..? | base |
| Prisms deviate light towards the...? | Apex |
| What is dispersion? | The breaking up of white light into its spectral components (wavelengths/colors)of the electromagnetic spectrum. |
Created by:
griffiskr
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