An object of 6 cm height is 16 cm in front of a converging lens with focal length of magnitude 4 cm. What is the dimension of the image(include the unit and if it is the case the sign)?

Respuesta :

Answer:

[tex]- 2[/tex] cm

Explanation:

[tex]h_{o}[/tex] = height of the object = 6 cm

[tex]d_{o}[/tex] = distance of the object from the lens = 16 cm

[tex]f[/tex] = focal length of the lens = 4 cm

[tex]d_{i}[/tex] = image distance

using the lens equation

[tex]\frac{1}{d_{o}} + \frac{1}{d_{i}} = \frac{1}{f}[/tex]

[tex]\frac{1}{16} + \frac{1}{d_{i}} = \frac{1}{4}[/tex]

[tex]d_{i} = \frac{16}{3}[/tex] cm

[tex]h_{i}[/tex] = height of the image

Using the equation

[tex]\frac{h_{i}}{h_{o}} = \frac{- d_{i}}{d_{o}}[/tex]

[tex]\frac{h_{i}}{6} = \frac{- \frac{16}{3}}{16}[/tex]

[tex]h_{i} =-2[/tex] cm