"Name and write a short note on some famous visiting sites that are based on principle of light".
this is a class 10 science project and is urgent .
Answers
Answer:
Light is a form of energy that produces in us the sensation of sight.
• Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
• The two laws of reflection are:
(i) the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane.
(ii) the angle of reflection (r) is always equal to the angle of incidence (i)
∠r = ∠i
• In a plane mirror, the image of a real object is always
(i) virtual,
(ii) erect
(iii) of same size as the object,
(iv) as far behind the mirror as the object is in front of the mirror.
(v) laterally inverted.
• Absolute refractive index(n) of a medium is the ratio of speed of light in vacuum or air(c) to the speed of light in the medium(v) i.e.
• Refraction of light is the phenomenon of change in the path of light in going from one medium to another.
• In going from a rarer to a denser medium, the ray of light bends towards normal and in going from a denser to a rarer medium, the ray of light bends away from normal.