LIGHT : REFLECTION AND REFRACTION
por Snigdha Gupta-VIIIA
1. LENSES
1.1. CONVEX LENS CONVERRGING
1.2. CONCAVE LENS DIVERGING
1.2.1. SIMPLE MICROSCOPE
1.2.2. USED IN CONTACT LENS
1.2.3. COMPOUND MICROSCOPE
1.2.4. USED IN FLASH LIGHTS
1.2.5. USED IN PEEP HOLES
2. REFRACTION OF LIGHT:LAWS
2.1. SNELLS LAW THE RATIO OF THE SIN ANGLE OF INCIDENCE RAY TO THE SIN OF ANGLE OF REFRACTION IS ALWAYS CONSTANT i.e. 1
2.2. THE INCIDENT RAY, THE NORMAL AND THE REFRACTED RAY AT THE POINT INCIDENCE ALL LIE IN THE SAME PLANE
3. FORMULA FOR FOCAL LENGTH
3.1. MIRROR FORMULA 1/F= 1/V + 1/U
3.2. LENS FORMULA 1/F=1/V-1/U
4. MAGNIFICATION
4.1. MIRRORS M= -V/U= Hi/Ho
4.2. LENSES M= V/U= Hi/Ho
5. REFRACTIVE INDEX
5.1. THE RATIO OF THE VELOCITY OF LIGHT IN A VACUUM TO ITS VELOCITY IN A SPECIFIED MEDIUM.
5.2. N= VELOCITY OFLIGHT IN MEDIUM 1 ----------------------------------------------- VELOCITY OF LIGHT IN MEDIUM 2
6. MIRRORS
6.1. PLANE -: PRODUCES VIRTUAL IMAGE OF SAME SIZE AND AT SAME DISTANCE
6.1.1. USED IN LOOKING GLASSES
6.1.2. USED IN SOLAR COOKER
6.2. CONCAVE-: PRODUCES BOTH VIRTUAL AND REAL IMAGE
6.2.1. FLOOD LIGHTS
6.2.2. TORCHES AND HEADLIGHT
6.2.3. REFLECTOR FOR PROJECTOR LAMPS
6.2.4. SOLAR DRIVER
6.3. CONVEX-: PRODUCES VIRTUAL IMAGE
6.3.1. FOUND IN SECURITY CAMERA
6.3.2. FOUND IN INDOOR AND OUTDOOR ON VEHICLE