For a concave mirror, if the object distance is less than the focal length, the image is virtual, upright, and enlarged.O TrueFalseAt least three rays of light are needed in order to find out where the image is formed.O TrueO FalseTotal interhal reflection can occur when light travels from vacuum to an optical medium with higher index of refraction.O TrueFalseThe reason that a prism can produce a colorful spectrum from a white light source is that its index of refraction is a function ofwavelength.O TrueFalse

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A ball is held 480 cm in front of a plane mirror.The distance between the ball and its imageis:1. 480 cm2. 1440 cm3. 0 cm4. 960 cm5. 1920 cm
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For a concave mirror, if the object distance is less than the focal length, the image is virtual, upright, and enlarged. O True O False