अट व्हाट डिस्टेंस फ्रॉम अ कॉनकेव मिरर आफ फोकल लेंथ 200 सेंटीमीटर फ्रॉम स्टैंडेटीज इमेजेस हाफिज हाइट
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Given,
object height h
1
=1.5 cm
real image length h 2
=−3cm
Position of object from the mirror u=−15cm
Mirror magnification formula
m=
h
1
h
2
=−
u
v
1.5
−3
=
−15
−v
v=−30cm
Apply Mirror formula
f
1
=
−30
1
+
−15
1
f=−10cm
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