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Physics
An image of a candle is produced by a convex lens 14 cm away. If the focal length of the lens is 7 cm, how far from the lens is the candle placed? (USe the thin lens equation) For this question, how would you know whether the
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An object is placed 20.0 cm from a thin converging lens along the axis of the lens. If a real image forms behind the lens at a distance of 8.00 cm from the lens, what is the focal length of the lens?
asked by Lauryn on February 2, 2017 
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An object is placed in front of a converging lens in such a position that the lens (f = 13.2 cm) produces a real image located 23.5 cm from the lens. Then, with the object remaining in place, the lens is replaced with another
asked by Elle on December 1, 2014 
calculus problem
the thin lens equation in physics is 1/s+1/S=1/f where s is the object distance from the lens,S is the image distance from the lens,and f is the focal length of the lens.Suppose that a certain lens has a focal length of 6cm and
asked by roslin on October 27, 2010 
Physics  Optics
A photographic slide is to the left of a lens. The lens projects an image of the slide onto a wall which is a distance of 5.94 m to the right of the slide. The image is larger than the size of the slide by a factor of 82.0. How
asked by Tifani on July 17, 2007

optics
A thin, doubleconvex lens has a refractive index of 1.50. The radius of curvature of the front surface is 15 cm and that of the rear surface is 10 cm. See sketch. (a) How far from the lens would an image of the sun be formed? (b)
asked by Ray on May 29, 2013 
Physics
Hi I am having difficulty with this question: Consider a simple “system” of a thin lens with focal length 12 cm, an input plane at 25 cm in front of the lens and an output plane at 11 cm beyond the lens. a) Find the matrix for
asked by John J.B on March 12, 2016 
physics
A 15.0cm object is placed 60.0cm from a convex lens which has a focal lenght of 15.0cm use the thin lens equation to find the distance of the image (60)1/15=1/60+1/60(1/15)=11+1/d
asked by maria on April 23, 2015 
math
You did not watch your units, you are mixing inches and feet Your equation should have been 1/2 = 1/di + 1/120 (I changed 10 feet to 120 in) solve this for di and you get 2.03 inches. Please help me I am so confused I think I am
asked by Reiny on May 9, 2007 
college physics
A 4.5 cm long insect is perpendicular to the optical axis of a thin lens; the bug is 5.4 cm away from the lens. The lens forms an inverted image of the insect which is 0.9 cm long on a screen behind the lens. a. How far behind the
asked by william on September 17, 2011