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.
Answers
Explanation:
Sambucus is a genus of flowering plants in the family Adoxaceae. The various species are commonly called elder or elderberry. The genus was formerly placed in the honeysuckle family, Caprifoliaceae, but was reclassified as Adoxaceae due to genetic and morphological comparisons to plants in the genus Adoxa. Wikipedia
Scientific name: Sambucus
Higher classification: Moschatel family
Rank: Genus
Family: Adoxaceae
Order: Dipsacales
Kingdom: Plantae
Answer:
Place a plane mirror on the table. Take a paper sheet and make a small hole in its center.
Make sure that the light in the room is not bright. Hold the sheet normal to the table. se
Take another sheet and place it on the table in contact with the vertical mirror. Draw a normal line on the second sheet from the mirror. Now, light a torch on the mirror through the small hole such that the ray of light falls on the normal at the bottom of the mirror.
When the ray from this hole is incident on the mirror, it gets reflected in a certain direction. You can easily observe the incident ray, reflected ray and the normal to the mirror at the point of incidence on the sheet placed on the table.
This shows that the incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in the same plane.
Explanation:
The law of reflection states that the angle of reflection equals the angle of incidence—θr = θi. The angles are measured relative to the perpendicular to the surface at the point where the ray strikes the surface.