MCQ
Study the given ray diagrams and select the correct statement from the following :
- ADevice $X$ is a concave mirror and device $Y$ is a convex lens, whose focal lengths are $20 \ cm$ and $25 \ cm $ respectively.
- BDevice $X$ is a convex lens and device $Y$ is a concave mirror, whose focal lengths are $10 \ cm$ and $25 \ cm $ respectively.
- CDevice $X$ is a concave lens and device $Y$ is a convex mirror, whose focal lengths are $20 \ cm$ and $25 \ cm$ respectively.
- ✓Device $X$ is a convex lens and device $Y$ is a concave mirror, whose focal lengths are $20 \ cm$ and $25 \ cm$ respectively.
