Physics Review QuestionUnit:
OpticsYear:
1990 Question#:
98Question:
An object is placed 0.40 meter in front of a convex (converging) lens whose focal
length is 0.30 meter. What is the image distance?(1
) 0.17 m(2
) 0.83 m(3
) 1.2 m(4
) 5.8 mWhat is this question really asking?
Explanation by: Brian L [ Return to question menu
]Answer 1
0.17 m INCORRECT Use the equation: When you solve for di, you do not get 0.17 m. return to top
Answer 2
0.83 m INCORRECT Use the equation: When you solve for di, you do not get 0.83m. If you chose this answer, did you mistakenly calculate the inverse of the image distance? return to top
Answer 3
1.2 m CORRECT Solve for the image distance. return to top
Answer 4
5.8 m INCORRECT return to top
What's this question really asking?
Can you use the thin-lens formula? The formula to know is: return to top |

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