Question

An object in front of a concavemirror with f = 15.0 cm forms animage at -6.33 cm. Find theobject distance.(Mind your minus signs.)(Unit = cm)

Answer 1

Answer:

The object distance = 4.45 cm

Step-by-step explanation:

Given

The focal length, f = 15.0 cm

The image distance, v = -6.33 cm

The object distance, u = ?

The focal length, object distance, image distance are related by the formula:

`\begin{gathered} (1)/(f)=(1)/(u)+(1)/(v) \\ \\ (1)/(15)=(1)/(u)-(1)/(6.33) \\ \\ (1)/(u)=(1)/(15)+(1)/(6.33) \\ \\ (1)/(u)=0.22464454976 \\ \\ u=(1)/(0.22464454976) \\ \\ u=4.45\text{ cm} \\ \end{gathered}`

The object distance = 4.45 cm