Question

an object is placed at a distance of 4 cm in front of a convex mirror whose fical length is 5 cm where is the image formed​

Answer 1

Answer:

ANSWER

Object Distance(u) = 10 cm. (negative)

Focal length of the lens (f) = 5 cm.

We know, convex mirror always forms the virtual, upright and diminished.Also, Object distance in the convex mirror is always negative where as Image distance and focal length are positive.

Now, Applying the Mirror's Formula,

f

1

​  

 =  

v

1

​  

 +  

u

1

​  

 

=  

5

1

​  

 =  

v

1

​  

 +  

1

​  

 

=  

5

1

​  

 =  

10v

(10−v)

​  

 

10v=50−5v

15v=50

v=  

3

10

​  

 

so the image distance (v) =3.33cm.

Explanation: