JAMB - Physics (1979 - No. 12)
An object is placed 30cm from a concave mirror of focal length 15cm. the linear magnification of the image produced is
o
\(\frac{2}{3}\)
1
2
3
คำอธิบาย
U = 30cm = 2f = r
V = 30cm
hence, m = \(\frac{v}{u}\) = \(\frac{30}{30}\)
= 1
V = 30cm
hence, m = \(\frac{v}{u}\) = \(\frac{30}{30}\)
= 1