Q). Study the given Ray diagrams and identify the devices 'X' and 'Y'. Also find the focal length of the devices.
Dear student,
Device X is a convex lens and device Y is a concave mirror whose focal lengths are 20 cm and 25 cm, respectively.
Reason being a parallel ray of light incident on a concave mirror gets reflected, and the image is seen on a screen placed before it which is seen in case of Y. A parallel ray of light incident on a convex lens converges to a point which is seen in case of X.
Regards
Device X is a convex lens and device Y is a concave mirror whose focal lengths are 20 cm and 25 cm, respectively.
Reason being a parallel ray of light incident on a concave mirror gets reflected, and the image is seen on a screen placed before it which is seen in case of Y. A parallel ray of light incident on a convex lens converges to a point which is seen in case of X.
Regards