สรุป วิทย์ E : LIGHT & COLOURS

สรุป วิทย์ E : LIGHT & COLOURS

-         Light’s speed is ……… x ……………… m/s and takes about ……………….. minutes to travel from the Sun to the Earth

-         You hear the thunder BEFORE / AFTER the lightning.

-         Reflection of light is ……………………………………………………………… Refraction oft light is ………………………………………………………………………

-         Reflection of light on smooth surface such as ……………………………………………….. is called ……………………………………………………………

-         Reflection of light on rough surface is called …………………………………………………………… or ……………………………………………………………….. and no longer be parallel

-         The angle of ……………………………………………………………………….. is equal to the angle of ………………………………………………………………………..

-         Image from by plane mirror are ……………………..... , ………………………… , ……………… , ……………………….. , ………………………………………………..

 

-         This word is ………………………………………………………….. same as in AMBULANCE written in front of ambulance

USES OF MIRRORS AND LENS

Plane Mirror

-         Looking glass

-         Reflect light on the object

-         Periscope (กล้องเรือดำน้ำ)

-         Kaleidoscope

-         Epidiascope

Concave Mirrors

-         Shaving mirror or Cosmetic Mirror

-         Dentist’s mirror

-         Headlight , Torchlight , Searchlight , Projectors’ Reflector

-         Reflecting telescope

Convex Mirrors

-         Street light reflector

-         Vigilance mirror

Convex Lens

-         Magnifying glass

o  Laboratory to see greater detail

o  Watch maker

o  Reads very small prints

-         Microscope [ Obj is thicker ]

-         Camera

-         Astronomical Telescope [ Obj thinner ]