JAMB - Physics (1988 - No. 24)
An object is placed 10cm in front of a concave mirror of focal length 15cm. What is the position and nature of the image formed?
30cm and virtual
6cm and real
6cm and virtual
30cm and real
คำอธิบาย
F = \(\frac{uv}{u + v}\)
15 = \(\frac{10 \times v}{10 + v}\)
v = -30cm
15 = \(\frac{10 \times v}{10 + v}\)
v = -30cm