A 0.54 cm high object is placed 8.5 cm in front of a diverging lens whose focal length is -7.5 cm. What is the height of the image?

Respuesta :

Answer:

[tex] 0.25[/tex]  cm

Explanation:

[tex]h_{o}[/tex] = height of the object = 0.54 cm

[tex]d_{o}[/tex] = distance of the object = 8.5 cm

[tex]f[/tex] = focal length of the diverging lens = - 7.5 cm

[tex]d_{i}[/tex] = distance of the image = ?

Using the lens equation

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

[tex]\frac{1}{8.5} + \frac{1}{d_{i}} = \frac{- 1}{7.5}[/tex]

[tex]d_{i} = - 3.98[/tex] cm

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

[tex]\frac{h_{i}}{0.54} = \frac{- (- 3.98)}{8.5}[/tex]

[tex]h_{i} = 0.25[/tex] cm