In case of reflection of light, the incident ray, the reflected ray and normallie on different planes.

An incident ray of light is initially normal to the surface of a plane mirror. The mirror is rotated untilthe angle between the incident and reflected rays is 30°. The mirror has been rotated through an angleof

A light ray strikes a plane mirror at an angle to its surface.  Which of the following is equal to the angle of reflection of the ray?The angle between the reflected ray and the normalThe angle between the surface and the reflected rayThe angle between the incident and reflected raysThe angle between the surface and the normal2A ray of light is normally incident onto a mirror (in other words, it is incident along the normal).  Which of the following statements does NOT apply to this situation?Its angle of reflection is equal to 90°Its angle of incidence is equal to 0°The normal is at right angles to the surface of the mirrorThe Law of Reflection will apply when the ray reflects from the surface3Which of the following statements does NOT apply to wavefront diagrams?The distance between two adjacent wavefronts is equal to the wavelength of the waveWavefront diagrams can be used to describe the reflection of any type of waveIf the speed of a wave is constant and its frequency increases, the distance between its wavefronts will decreaseWavefronts are always drawn parallel to the direction in which the wave is travelling4A sound wave strikes a flat brick wall.  The angle between the incident wave and the wall is 30°.  What is the angle of reflection of this wave?90°60°30°150°5The angle of incidence of a light ray onto a plane mirror is 20°.  What is the angle of reflection of the ray?0°70°20°40°6A ray of light is travelling from glass into air at an angle of incidence of 40°.  The critical angle for the glass-air boundary is 41°.  What will happen to the ray of light when it strikes the boundary?It will travel along the boundary (interface) between the air and the glass (in other words, its angle of refraction will be equal to 90°)It will undergo total internal reflectionIt will pass out of the glass and refract away from the normalIt will not be refracted or reflected and will continue in its original path7A ray of light is travelling from water into air.  The critical angle for the water-air boundary is 49°.  For which of the following angles of incidence will this ray undergo total internal reflection?49°48°50°0°

A ray of light is incidenting normally on a plane mirror. The angle of reflection will beSelect an answerA0°B90°CWill not be reflectedDNone of the above

State the laws of reflection. Describe an activity to show that incident ray, reflected ray and the normal, at the point of incidence, all lie in same plane & Trace the path of reflected ray in the following ray diagrams.

Line drawn perpendicular to the reflecting surface at the point of incidence is calledA.Refracted raysB.Reflected raysC.Incident raysD.Normal