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Question➡️⤵️
- a concave mirror having its radius of curvatune 30 cm . if an object of size 2cm is placed in front of the mirror . find the position , nature & size so obtained at a distance of 40cm?
Answer➡️⤵️
Explanation➡️⤵️
✴️ Given ,
✴️ Radius of curvature , R = 30cm
✴️ Object distance , u = 40cm
✴️ Object height , ho = 2 cm
✴️The focal length of the mirror , f = -R/2 = -15
From mirror equation ,
✴️ 1/v + 1/u = 1/f
✴️ ==> 1/v + 1/-30 = 1/-15
✴️ ==> v = 30cm
The magnification , M = -v/u
✴️ ==> - -30/-30
✴️ ==> 1
Hence the image is inverted, enlarged, real and its size is 2 × 1 = 2cm
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