The ideal shape for the primary mirror of a telescope is concave parabolic.
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[Ques. 2] A curved mirror that produces an enlarged image will also have a greater field of view than a plane mirror.
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[Ques. 3] You look at yourself in a plane mirror. If you move away from the mirror and look at yourself again, you now see more of yourself.
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[Ques. 4] A one-way mirror works because its surfaces are half-silvered.
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[Ques. 5] An EM wave with a wavelength of 500 nm will be visible.
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[Ques. 6] Astigmatism is due to too flat a cornea.
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[Ques. 7] The lens in your eye and the cornea both contribute to image formation.
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[Ques. 8] Your eye's iris changes the size of your pupil to adjust the amount of light that enters your eye.
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[Ques. 9] The colors you see with a prism result because the light is diffracted.
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[Ques. 10] Light goes slower through glass than through air.
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