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Physics
Physics
Problem
There is a concave lens of focal length
f
f
f
. A ray parallel to
x
x
x
-axis is incident on the lens at
y
=
b
y = b
y
=
b
. The equation of the refracted ray will be (A)
y
=
b
x
f
+
b
y = \frac{bx}{f} + b
y
=
f
b
x
+
b
(B)
y
=
−
b
x
f
+
b
y = -\frac{bx}{f} + b
y
=
−
f
b
x
+
b
(C)
y
=
b
x
f
−
b
y = \frac{bx}{f} - b
y
=
f
b
x
−
b
(D)
y
=
f
x
b
+
b
y = \frac{fx}{b} + b
y
=
b
f
x
+
b
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