What a prism, a convex lens and a concave mirror do to a plane wavefrontप्रिज़्म, उत्तल लेंस और अवतल दर्पण समतल तरंगाग्र के साथ क्या करते हैंWhat a prism, a convex lens and a concave mirror do to a plane wavefront
NCERT Fig 10.7 · Class 12 Physics · Chapter 10 · interactive diagram
Read Chapter 10 with this diagramइस डायग्राम के साथ अध्याय 10 पढ़ेंIs diagram ke saath Ch 10 padhiyeAll Physics diagramsसभी भौतिकी डायग्रामSaare Physics diagrams
Parts and what they mean
- Thin prism (पतला प्रिज़्म) — Light is slower in glass. The lower part of the wavefront crosses the thickest glass and is delayed most.
- Incident plane wavefront (आपतित समतल तरंगाग्र) — A plane wave coming from the left.
- Emerging (tilted) wavefront (निर्गत (झुका) तरंगाग्र) — Because the lower part lags, the wavefront tilts and the wave (ray) bends towards the base of the prism.
- Convex lens (उत्तल लेंस) — Thickest at the centre, so the central part of the wavefront is delayed most.
- Converging spherical wavefronts (अभिसारी गोलीय तरंगाग्र) — The emerging wavefront has a depression at the centre: it becomes spherical and converges to the focus F.
- Focus F (lens) (फोकस F (लेंस)) — Point where the wave converges. Time taken from object to image is the same along every ray.
- Concave mirror (अवतल दर्पण) — Reflects a plane wave into a spherical wave converging to its focus.
- Reflected converging wavefronts (परावर्तित अभिसारी तरंगाग्र) — Travel back towards F (to the left).
- Focus F (mirror) (फोकस F (दर्पण)) — Focal point of the concave mirror, f = R/2.
Original diagram drawn by Simple Learning Hub, based on NCERT Fig 10.7. Report a mistake