Light And Sound
Gbogbo ọrọ náà
A straw looks broken where it enters a glass of water. A shout comes back off a distant wall a moment after you make it. A single strand of glass thinner than a hair carries a television channel across an ocean. All three are the same two ideas at work: waves bounce, and waves bend.
This lesson takes reflection and refraction from the ray box on the bench to the fibre under the sea. You will learn the law of reflection, investigate refraction through three different shapes of block, meet the critical angle, and see why sound behaves in exactly the same two ways as light.
Ebumnobi
- Know that light waves can be reflected and refracted
- Use the law of reflection (the angle of incidence equals the angle of reflection)
- Investigate the refraction of light, using rectangular blocks, semi-circular blocks and triangular prisms
- Describe the role of total internal reflection in transmitting information along optical fibres and in prisms
- Explain what is meant by critical angle
- Know that sound waves can be reflected and refracted
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Light And Sound. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- The law of reflection states that: A) the angle of incidence is twice the angle of reflection B) the angle of incidence equals the angle of reflection C) the angle of reflection is measured from the surface D) the angle of reflection is always 90 degrees Answer: B
- A ray of light passes from air into glass. It bends: A) away from the normal B) towards the normal C) not at all D) back along its original path Answer: B
- Total internal reflection can occur when light travels: A) from air into glass at any angle B) from glass into air below the critical angle C) from glass into air above the critical angle D) from air into glass above the critical angle Answer: C
- A ray of light strikes a mirror at 20 degrees to the mirror surface. The angle of reflection measured from the normal is: A) 20 degrees B) 40 degrees C) 70 degrees D) 90 degrees Answer: C
- A ray enters a semi-circular block aimed at the centre of the flat face. At the curved surface it: A) bends towards the normal B) bends away from the normal C) does not bend, because it travels along the normal D) is totally internally reflected Answer: C
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Refraction
Explain refraction at media boundaries, predict the path of light after passing through a boundary (Snell’s law), describe the index of refraction of materials, explain total internal reflection, and describe applications of refraction and total internal reflection
"Physics: Refraction" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/16-2-refraction. Access for free at https://openstax.org/books/physics/pages/1-introduction
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Akụkụ akwụkwọ
Reflection
Explain reflection from mirrors, describe image formation as a consequence of reflection from mirrors, apply ray diagrams to predict and interpret image and object locations, and describe applications of mirrors
"Physics: Reflection" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/16-1-reflection. Access for free at https://openstax.org/books/physics/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Light And Sound? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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