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Focal length and power of lens, Index of refraction of block material

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September 28th, 2022

3. A photographer wishes to take a picture of his pet chicken Fred, who happens to have a fine-face 5.0 cm high. While standing 2.0 m away, he selects a lens that will fill the film (24 mm top-to-bottom) with Fred’s face. What is the focal length and power of the lens that should be used?

4. Using a block of transparent, unknown material, it is found that a beam of light inside the material is totally internally reflected at the air-block interface at an angle of 48.0 degrees. What is the index of refraction of the block material?

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