A convex lens of focal length 3cm is placed between a screen and a square plate of area 4 cm^2 . The image formed on the screen is 16cm^2. Calculate the distance between plate and the screen
Answers
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long.
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the object
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the objectSolution:
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the objectSolution:Let the height of the object be h1
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the objectSolution:Let the height of the object be h1At the first position,
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the objectSolution:Let the height of the object be h1At the first position, m1=h14=−uv
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the objectSolution:Let the height of the object be h1At the first position, m1=h14=−uvAt the second position,
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the objectSolution:Let the height of the object be h1At the first position, m1=h14=−uvAt the second position, m2=h19=−vu
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the objectSolution:Let the height of the object be h1At the first position, m1=h14=−uvAt the second position, m2=h19=−vuNow, m=m1×m2⟹(−uv)×(−vu)=h14×h19⟹h12=36⟹h1=6cm
Given: A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing object or the screen, we again get a real image on the screen which is 9 cm long. To find the length of the objectSolution:Let the height of the object be h1At the first position, m1=h14=−uvAt the second position, m2=h19=−vuNow, m=m1×m2⟹(−uv)×(−vu)=h14×h19⟹h12=36⟹h1=6cmHence the length of the object should be 6 cm.
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