Questions: Using the values for your lens in the first three situations, calculate the focal length of this lens using the following equation. Find the average value of the four focal lengths. Calculate your percent error between your calculated value and the value printed on the lens. What kind of lens is the lens found in the structure of the eye? Explain how the image appears as it is projected on your retina. Object Image Location Calculated Focal % Error for Location (do) (di) Point Focal Point do > 2f What do = 2f kind of lens 2f > do > f is a do < f magnifying glass? How far from the lens must you hold the object in order for a magnifying glass to work? Where you able to produce a real image with the concave lens? Explain why or why not. What kind of lens MUST be used if one wishes to focus the sun’s rays to start a fire? If you were to cover half of the lens, predict what would happen to your image. Draw ray diagrams for each trial for your lenses on the grids below.
Questions: Using the values for your lens in the first three situations, calculate the focal length of this lens using the following equation. Find the average value of the four focal lengths. Calculate your percent error between your calculated value and the value printed on the lens. Object Location (do) Image Location (di) Calculated Focal Point % Error for Focal Point do > 2f do = 2f 2f > do > f do < f What kind of lens is the lens found in the structure of the eye? Explain how the image appears as it is projected on your retina. What kind of lens is a magnifying glass? How far from the lens must you hold the object in order for a magnifying glass to work? Where you able to produce a real image with the concave lens? Explain why or why not. What kind of lens MUST be used if one wishes to focus the sun’s rays to start a fire? If you were to cover half of the lens, predict what would happen to your image. Draw ray diagrams for each trial for your lenses on the grids below.
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