1. Formula for Focal length
1.1. Mirror Formula
1.1.1. 1/f = 1/v + 1/u
1.2. Lens Formula
1.2.1. 1/f = 1/v - 1/u
2. Power of lens
2.1. Power is measured in Dioptre
2.2. P= 1/f
3. Magnification
3.1. Mirror
3.1.1. m= -v/u
3.1.2. m= height of image/ height of object
3.2. lense
3.2.1. m = v / u
3.2.2. m = height of image / height of object
4. Laws of refraction of light
4.1. The incident ray, the normal and the reflected ray at the point of incidence all lie in the same plane for the two given transparent medium.
4.2. The ratio of the sin of angle of incidence to the sin of angle of reflection is always constant.
5. Laws of reflection of light
5.1. The incident ray,the normal to the surface at the point of incidence and the reflected ray, all lie in the same plane.
5.2. The angle of incidence is equal to the angle of reflection.
6. Refractive index
6.1. n = Velocity of light in medium 1 / Velocity of light in medium 2
7. MIRRORS
7.1. Plane mirror
7.1.1. Produces virtual images of same size at same distance.
7.2. Concave mirror
7.2.1. Uses
7.2.1.1. Shaving mirror
7.2.1.2. Solar furnances
7.2.1.3. Head mirror
7.2.1.4. Astronomical telescopes
7.3. Convex mirror
7.3.1. Position of object
7.3.1.1. At infinity
7.3.1.1.1. real image at focus
7.3.1.2. Beyond C
7.3.1.2.1. real image b/w F and C
7.3.1.3. At C
7.3.1.3.1. real image at C
7.3.1.4. B/w F and C
7.3.1.4.1. real image beyond C
7.3.1.5. At F
7.3.1.5.1. real image at infinity
7.3.1.6. B/w P and F
7.3.1.6.1. Virtual image behind the mirror
7.3.2. Uses
7.3.2.1. Street light reflector
7.3.2.2. Rear view mirror
7.3.2.3. Parking lots
7.3.2.4. ATMs
7.3.3. Position of object
7.3.3.1. At infinity
7.3.3.1.1. Virtual image at F
7.3.3.2. b/w infinity and pole
7.3.3.2.1. VIrtual image b/w P and F
8. Lenses
8.1. Concave
8.1.1. Uses
8.1.1.1. Spectacles
8.1.1.2. Lasers
8.1.1.3. Peepholes
8.1.1.4. Cameras
8.1.2. Position of object
8.1.2.1. At infinity
8.1.2.1.1. Virtual image at F2
8.1.2.2. b/w infinity and pole
8.1.2.2.1. Virtual image b/w P and F2
8.2. Convex
8.2.1. Uses
8.2.1.1. Magnifying glass
8.2.1.2. Cameras
8.2.1.3. Spectacles
8.2.1.4. Microscopes
8.2.2. Position of object
8.2.2.1. At infinity
8.2.2.1.1. real image at F2
8.2.2.2. Beyond F2
8.2.2.2.1. real image b/w F2 and 2F2
8.2.2.3. At 2F2
8.2.2.3.1. real image at 2F2
8.2.2.4. b/w F1 and F2
8.2.2.4.1. real image beyond 2F2
8.2.2.5. At F1
8.2.2.5.1. real image at infinity
8.2.2.6. b/w F2 and O
8.2.2.6.1. image on same side of the lens at the object