Plse ans me 2
Dear student,
Fig 1 shows the refraction of parallel rays of light A, B and C incident on a convex lens. The prism in the upper part of the convex lens has its base downwards, and the prism at the lower part has its base upwards. So, the upper prism bends the incident light ray (A) downwards, whereas the lower prism bends the light ray (C) upwards. The central part is a parallel sided glass block. So light ray (B) incident normally, passes through it un-deviated.
Fig 2 shows the refraction of parallel rays of light on the concave lens. The prism in the upper part of the concave lens has its base upwards, so light ray passing through it bends upward. And the prism in the lower part of the concave lens has its base downwards, so the light ray passing through it bends downward. and similarly, the light ray incident normally and passes through the parallel glass slab remains un-deviated.
Regards,
Fig 1 shows the refraction of parallel rays of light A, B and C incident on a convex lens. The prism in the upper part of the convex lens has its base downwards, and the prism at the lower part has its base upwards. So, the upper prism bends the incident light ray (A) downwards, whereas the lower prism bends the light ray (C) upwards. The central part is a parallel sided glass block. So light ray (B) incident normally, passes through it un-deviated.
Fig 2 shows the refraction of parallel rays of light on the concave lens. The prism in the upper part of the concave lens has its base upwards, so light ray passing through it bends upward. And the prism in the lower part of the concave lens has its base downwards, so the light ray passing through it bends downward. and similarly, the light ray incident normally and passes through the parallel glass slab remains un-deviated.
Regards,