Physics
Grade-10
Easy
Question
A parallel beam of light when passes through a concave lens ____.
- Converges to a point called focus
- Diverges from a point called focus
- Appears to diverge from a point called focus
- None of these
Hint:
A concave lens is a diverging lens. When parallel rays of light pass through a concave or diverging lens, the refracted rays diverge in such a way that they appear to come from one point called the focus.
The correct answer is: Appears to diverge from a point called focus
A parallel beam of light when passes through a concave lens appears to diverge from a point called focus.
- The concave lens is also called a diverging lens.
- When a parallel beam of light is passed through the concave lens, after refraction the rays diverge away from the normal.
- The emergent rays seem to be diverged from a point in the principal axis.
- The point is called principle focus.
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