Draw the boundaries of the rectangular glass slab by placing it on the white sheet.Ĥ. Draw a vertical line dividing the sheet into two equal parts.ģ. With the help of drawing pins, fix the drawing sheet on a drawing board.Ģ. ![]() The angle that the emergence ray makes with normal is known as the emergent angle.ġ. The ray which leaves the glass from another side is called an emergence ray.Ħ. The angle of incidence and the angle of emergence are equal.ĥ. When a light ray travels from glass to air, it bends away from the normal.Ĥ. When a light ray travels from air to glass, it bends toward the normal.ģ. air-glass interface and glass-air interface.Ģ. The refraction will occur at both sides of the rectangular glass slab, i.e. To track the path of a light ray passing through a rectangular glass slab for different incident angles and try to measure the angle of incidence, angle of reflection, and angle of emergence. Lateral displacement is proportional to the angle of incidence and the thickness of the glass slab. The line of emergence is parallel to the line of incidenceħ. The angle of emergence is equal to the angle of incidence.Ħ. If the light ray falls normally on a glass slab, it will travel in the same direction without deflection.ĥ. The angle of reflection is greater than the angle of incidence when travelling from glass slab to air.Ĥ. The incident angle is greater than the angle of reflection in entering from air to glass slab.ģ. When light enters a glass slab, it bends toward the normal.Ģ. Where n21 is the refractive index of the second medium concerning the first medium. According to Snell’s law of refraction, the ratio of the sine of incidence and the sine of reflection is constant. Incident rays, normal and reflected rays, all lie on the same plane.Ģ. ![]() ![]() Speed of light reduces in going from rarer medium to denser medium. Speed and wavelength will change in refraction.Ħ. In refraction, when light travels from one medium to another. When a light ray travels from a denser medium to a rarer medium, light bends away from the normal.Ĥ. When a light ray passes from a rarer medium to a denser medium, light rays bend towards the normal.ģ. This happening is called the reflection of light.Ģ. When a beam of light enters from one medium to another, its path has a slight deflection. Thus we will explore Reflection Through Glass Slab. In this science experiment, we will learn to trace the path of a light ray passing through a rectangular glass slab for different incident angles and try to measure the angle of incidence, angle of reflection and angle of emergence. 13 Viva Questions With Answers Introduction
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