(Summer 2018-1) PHY2049-G pHY2049 Home page of Tiffany Tiffany.phy2049 finalLe P
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(Summer 2018-1) PHY2049-G pHY2049 Home page of Tiffany Tiffany.phy2049 finalLe PHY 2049 Dr. C e.com/phy2049online/phy2049 final exam sum 7QSearch 7. A candle is placed 12cn away from a concave lens. The lens produces a virtual image -24cm away from the lens. If the object is moved back to 16cm from the lens, determine the position of the image with respect to the lens? Hint: ured from a reference surface, such as a wavefront or a refracting surface-the lens. Distances to the left of the surface are negathe Heights above the axis of symmetry of the lens are positive, below are negative to verify your caleulations! Click on the Understand tab at the right bottom to change the distances Osiet lasp and B)-24.5cm. c) +7.2cm. D)-5.3em. 3 sig figs: 0.00234 OR 2.34E-3; use capital E 429 9-10 *t the m o tional emf at t 89s is: 2.4s , in an external magnetic field B s. By a circular loop of wire, r 0.5m, at an angular speed ? dtdt (B A cos (u)).Explanation / Answer
Given,
i1 = -24 cm ; o1 = 12 cm ; f1 = ?
We know that,
1/f = 1/i + 1/o
f = i x o/(i + o)
f = -24 x 12/(-24 + 12) = 24 cm
Now, f remains same, but o2 = 16 cm
i = o x f/(o - f)
i = 16 x 24/(16 - 24) = -48 cm
Hence, i = -48 cm
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