An object at a distance of 30 cm from a concave mirror gets its image at same point. The focal length of the mirror is
Answers
Answered by
12
Answer:
The focal length of mirror is 15 cm.
Explanation:
To calculate the focal length use the mirror formula as
\frac{1}{f}=\frac{1}{u} +\frac{1}{v}
Here u is the object distance and v is the image distance.
As object and image are located at the same point and in front of concave mirror then we take u = +30 cm and v = + 30 cm.
Substitute the values, we get
\frac{1}{f} =\frac{1}{30cm} +\frac{1}{30cm}
\frac{1}{f} =\frac{2}{30cm}
f = + 15 cm.
Thus, the focal length of mirror is 15 cm.
Answered by
1
Answer:
The focal length of mirror is 15 cm.
Explanation:
Similar questions