Shadows, Pinhole Cameras, Prisms
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is umbra? | Latin word for shade; another work for shadow
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| What is penumbra? | Latins word meaning almost a shade
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| What does eclipse mean? | Greek work for failure to appear.
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| In a pinhole camera the smaller the hole, the _______ the image. | Sharper
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| Where does the word image come from? | The Latin word Imaga, which means imitation
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| Images are ________, so they appear upside down? | Inverted
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| What is a prism? | An optical medium with non-parallel sides?
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| Angles inside and outside the prism are usually not _____? | Equal
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| 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
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| The two refracting surfaces are referred to as.... | first and second surfaces, or front and back surfaces
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| What is the reflecting surface of a prism? | The second surface if the critical angle is exceeded
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| What is the apical angle? | The number of degrees between the first and second refracting surface. Referred to as (a)
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| The orientation of prisms is described according to it's? | Base Direction
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| Prisms bend light towards the..? | base
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| Prisms deviate light towards the...? | Apex
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| What is dispersion? | The breaking up of white light into its spectral components (wavelengths/colors)of the electromagnetic spectrum.
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Created by:
griffiskr
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