jessicamcgoldri1191 jessicamcgoldri1191
  • 21-08-2019
  • Physics
contestada

A convex mirror with a focal length 20 cm creates a virtual image 10cm away from the mirror. What is the position of the object?

Respuesta :

JemdetNasr JemdetNasr
  • 25-08-2019

Answer:

[tex]20[/tex] cm

Explanation:

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

[tex]f[/tex] = focal length of the convex mirror = - 20 cm

[tex]d_{i}[/tex] = distance of the image = - 10 cm

Using the lens equation

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

[tex]\frac{1}{d_{o}} + \frac{- 1}{10} = \frac{- 1}{20}[/tex]

[tex]d_{o} = 20[/tex] cm

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