An object is placed 11.0 cm in front of a concave mirror whose focal length is 24.0 cm. The object is 2.60 cm tall. What is the height of the image? (cm)

Respuesta :

aachen

Answer:

Height of the image is 4.79 cm.

Explanation:

Object distance, u = -11 cm

Focal length of the mirror, f = -24 cm

Height of the object, h = 2.6 cm

We need to find the height of the image. Firstly, using the mirror's formula as :

[tex]\dfrac{1}{f}=\dfrac{1}{v}+\dfrac{1}{u}[/tex]

v is the image distance

[tex]\dfrac{1}{v}=\dfrac{1}{f}-\dfrac{1}{u}[/tex]

[tex]\dfrac{1}{v}=\dfrac{1}{(-24)}-\dfrac{1}{(-11)}[/tex]

v = 20.30 cm

The magnification of the image is given by :

[tex]m=\dfrac{-v}{u}=\dfrac{h'}{h}[/tex], h' is the height of the image

[tex]\dfrac{-v}{u}\times h={h'}[/tex]

[tex]\dfrac{-20.30}{-11}\times 2.6={h'}[/tex]

h' = 4.79 cm

So, the height of the image is 4.79 cm. Hence, this is the required solution.