Reflection
Bayani Gaba-gaba
Look at the front of an ambulance in your mirror and the word across its bonnet suddenly makes sense. It was painted back to front on purpose, because the only driver who needs to read it is the one looking at it through a piece of silvered glass. Somebody in a paint shop had to know, in advance and exactly, what a mirror does to a shape. They were not guessing. Reflection is one of the most precisely predictable things in the whole of physics, and the rule behind it fits into nine words.
This lesson turns that rule into a skill. You will learn where the normal is drawn and why every angle in this topic is measured from it rather than from the shiny surface itself, which is where most of the marks on this topic are quietly thrown away. You will then learn to build a ray diagram: to place the image behind the mirror by construction, find the exact point where the light bounces on its way to somebody's eye, and follow how that path shifts when the object moves, when the eye moves, or when the mirror itself is turned. By the end you will be able to say why the letters on the ambulance are reversed left to right and not top to bottom, which is a question far more people get wrong than get right.
Manufura
- When waves are reflected the angle of incidence is equal to the angle of reflection.
- The normal is a construction line perpendicular to the reflecting surface at the point of incidence.
- The image produced in a plane mirror is virtual, upright and laterally inverted. Students will be expected to be able to construct ray diagrams to represent the changing path of reflected rays.
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Reflection. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- A ray of light strikes a plane mirror. The angle between the incident ray and the surface of the mirror is 30 degrees. What is the angle of reflection? A. 15 degrees B. 30 degrees C. 60 degrees D. 120 degrees Answer: C
- What is the normal in a reflection diagram? A. A ray of light travelling along the reflecting surface B. A construction line drawn perpendicular to the reflecting surface at the point of incidence C. The reflected ray D. A line joining the object to the edge of the mirror Answer: B
- Which set correctly describes the image formed in a plane mirror? A. Real, upright and laterally inverted B. Virtual, upright and laterally inverted C. Virtual, upside down and the same way round left to right D. Real, upside down and magnified Answer: B
- An object is placed 5.0 cm in front of a plane mirror. What is the distance between the object and its image? A. 2.5 cm B. 5.0 cm C. 10.0 cm D. 25 cm Answer: C
- A plane mirror is rotated through 8 degrees while the incident ray is kept fixed. Through what angle does the reflected ray turn? A. 4 degrees B. 8 degrees C. 16 degrees D. 32 degrees Answer: C
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Reflection? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
