In fig.

, PQ and RS are two mirrors placed parallel to each other. An incident ray AB strikes the mirror PQ at B, the reflected ray move along the path BC and strikes the mirror RS at C and again reflects back along CD. Prove that AB II CD.

In Fig. 6.33, PQ and RS are two mirrors placed parallel to each other. An incident ray AB strikes the mirror PQ at B, the reflected ray moves along the path BC and strikes the mirror RS at C and again reflects back along CD. Prove that AB || CD.

If incident ray strikes the mirror at 90^@ , what will be the angle of reflection?

Two plane mirrors l and m are placed perpendicular to each other as shown in the figure. An incident ray AB to the first mirror is reflected in the directin of BC and then reflected by the second mirror in the direction CD. Prove that AB||CD

Two chords PQ and RS of a circle are parallel to each other and AB is the perpendicular bisector of PQ. Without using any construction, prove that AB bisects RS.

In the fig. AB is a mirror, PQ is the incidentray and QR, the reflected ray. If anglePQR=112^@ , find anglePQA

Why a ray of light through centre of curvature if incident on a plane mirror, reflects back with the same path?

Two glass pates P and Q are held close and parallel to each other.A narrow beam of onochromatic light AB of intensity I is incident on plnate P ,which is partially reflected and transmitted by it. The transmitted beam DE is reflected by plate Q,which is subsequently again reflected and transmitted by the plate P as shown in Fig.6.14. If durign a reflection,each glass plate reflects one-fourth of the light incident on it,then find the intesnstities of maxima and minima in the interference pattern produced by the two beams BC and IJ.

A parabola mirror is kept along y^2=4x and two light rays parallel to its axis are reflected along one straight line. If one of the incident light rays is at 3 units distance from the axis, then find the distance of the other incident ray from the axis.