# Lecture15 - A – 2/3 B – 2/9 C – 1/2 D 2/3 E 2/9 F 1/2...

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ANNOUNCEMENTS Tycho HW #5 Due Thursday Night. WebAssign #5 Friday Exam 2 Friday- Topics Posted Clicker Registration Issues? E-mail Me Another Clicker Score Upload Follows Exam 2…

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COMBINATIONS OF LENSES & MIRRORS 1/d O + 1/d i = 1/f USE THE EQUATION WITH THE OBJECT AND THE FIRST LENS OR MIRROR LET THE IMAGE FROM THE FIRST CALCULATION BE THE OBJECT FOR THE SECOND LENS OR MIRROR REPEAT AS NEEDED TO FIND THE FINAL IMAGE
WORKSHEET Q1: THE FIRST IMAGE IS HOW FAR FROM THE FIRST LENS? A. 30 cm TO THE LEFT B. 30 cm TO THE RIGHT C. 20 cm TO THE LEFT D. 20 cm TO THE RIGHT E. NONE OF THESE Q2: THE FINAL IMAGE IS HOW FAR FROM THE SECOND LENS? A. 8.2 cm TO THE LEFT B. 8.2 cm TO THE RIGHT C. 28 cm TO THE LEFT D. 28 cm TO THE RIGHT E. NONE OF THESE

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MAGNIFICATION Ratio of Height of Image to Height of Object: m = h i / h o Pure Number, Dimensionless. Note This Can Be Computed From Axial Distances: m = h i / h o = -d i / d o
Q3: Total Magnification (Final Image / Original Object):

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Unformatted text preview: A. – 2/3 B. – 2/9 C. – 1/2 D. + 2/3 E. + 2/9 F. + 1/2 G. None of These Q4: A Lens Makes a Sharp Image on a Screen. Now the Bottom Half of the Lens is Covered. What Do You See on the Screen? A. Top Half of Sharp Image. B. Bottom Half of Sharp Image. C. Blurry Half of Image. D. Full Sharp But Dimmer Image. E. None of These. OPTICAL DEVICES • MAGNIFIER = LENS • CAMERA • HUMAN EYE NEAR POINT = CLOSEST OBJECT DISTANCE AT WHICH EYE CAN FOCUS CLEAR IMAGE FILM LENS OBJECT OBJECT LENS RETINA = 25 CM (TYPICALLY) Q5: A Farsighted Person Would Need Which Type of Lens to Correct Her Vision? A. Diverging B. Converging C. Inverting D. Polarizing E. None of These MORE OPTICAL DEVICES • TELESCOPES o TERRESTRIAL o ASTRONOMICAL • MICROSCOPES • BINOCULARS • MANY OTHERS ALL OF THESE RELY ON MORE THAN ONE LENS OR MIRROR TO CREATE A FINAL IMAGE...
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Lecture15 - A – 2/3 B – 2/9 C – 1/2 D 2/3 E 2/9 F 1/2...

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