Bending of an immersed object: Let us consider a rod AB is dipped in water. The portion OB of the rod dipped in water appears to be shortened and raised up as OC. The rays of light from point B bend away from the normal after refraction at the interface separating the air and water. […]
Refraction Class – X Part – 3 Read More »
Deviation of a ray during refraction: Whenever a ray of light travels from one medium to another medium it deviates from its path. The angle between the refracted ray and the direction of the incident ray gives the measurement of deviation. Let us consider AO is the incident ray and OB is the refracted ray
Refraction Class – X Part – 2 Read More »
Refraction through plane surface: Laws of refraction: 1st law – The incident ray, the refracted ray, and the normal to the interface at the point of incidence, all lie on the same plane, called the plane of incidence. 2nd law – The ratio of the sine of angle of incidence (i) to the sine of
Refraction Class – X Part – 1 Read More »
Defects of vision of human eye: The most distant point which an eye can see clearly is called the far point (F). For the normal eye the far point lies at infinity. The nearest point which an eye can see clearly is called the near point (N). For normal eye, near point lies at a
Human eye is spherical in shape with a slight bulge at the front. Sclera: The outer part of eye is called sclera. It is white in colour with fibrous layer. The transparent part of it at the front of the outer side of the eye is called cornea. Light enters the eye through it. Its refractive index is
Mirror formula: If an object is at a distance u from the pole of a mirror of focal length f, then image distance is v. The Mirror formula is . The derivation of mirror formula is given in the blog ‘Reflection class – XII‘. To get the information click the given button. Click here Graph:
Reflection through curved surface Part – 3 Read More »
Image formation by a concave mirror: 1. When position of object is at infinity, position of image is at principle focus (F). Image is real inverted highly diminished. 2. When position of object is in between infinity and  centre of curvature (C), position of image is in between focus (F) and the centre of curvature
Reflection through curved surface Part – 2 Read More »
Laws of reflection: 1st Law -The incident ray, the reflected ray, and the normal, all lie on the same plane, called the plane of incidence. The incident and reflected rays are on the opposite side of the normal. 2nd Law – The angle of incident is always equal to the angle of reflection. If i
Reflection through curved surface Part – 1 Read More »
