Circle the right answer. A diopter is a unit equivalent to: A. meter/second B. 1

Question

Circle the right answer. A diopter is a unit equivalent to: A. meter/second B. 1/centimeter C. 1/meter D. 1/millimeter E. 1/second Circle the right answer. The film or CCD chip in a camera has a similar function to this part of the eye: A. Cornea B. Retina C. Lens Circle the right answer. Which of the following conditions in NOT necessary for the light waves from two sources to be coherent? A. They must have the same frequency. B. They must have the same wavelength. C. They must have the same amplitude. Circle True or False. If two or more sources of light are to show interference, they must be coherent. Explain why a near sighted or far sighted person can have laser vision correction instead of using precription glasses. What function does the cornea of the eye play? Describe Young's two-slit experiment Describe how a microscope works.

Explanation / Answer

1) (C) 1/meter

Diopter is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in meters (that is, 1/meters). It is thus a unit of reciprocal length.

However, if the focal length is given in centimeter, diopter will be 1/centimeter. Similarly, if the focal length is in millimeter, diopter will be 1/millimeter.

Of all these, 1/meter is the SI unit.

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