Light And Sound
Gbogbo ọrọ náà
Light and sound are two of the most familiar waves, yet they behave in fundamentally different ways. Light is a transverse electromagnetic wave that can travel through a vacuum; sound is a longitudinal mechanical wave that needs a medium.
In this lesson you will learn the law of reflection, Snell's law of refraction, how to draw ray diagrams, what total internal reflection is and why it matters for optical fibres, the meaning of critical angle, and the basic properties of sound waves.
Ebumnobi
- Know that light waves are transverse waves and that they can be reflected and refracted
- Use the law of reflection
- Draw ray diagrams to illustrate reflection and refraction
- Investigate the refraction of light using rectangular blocks, semi-circular blocks and triangular prisms
- Know and use the relationship between refractive index, angle of incidence and angle of refraction
- Investigate the refractive index of glass using a glass block
- Describe the role of total internal reflection in transmitting information along optical fibres and in prisms
- Explain the meaning of critical angle
- Know and use the relationship between critical angle and refractive index
- Know that sound waves are longitudinal waves which can be reflected and refracted
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
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 double the angle of reflection B) The angle of incidence equals the angle of reflection C) Light always bends towards the normal D) Light travels in curved paths Answer: B
- When light enters glass from air, it: A) Speeds up and bends away from the normal B) Slows down and bends towards the normal C) Speeds up and bends towards the normal D) Slows down and bends away from the normal Answer: B
- Total internal reflection occurs when: A) Light passes from a less dense to a denser medium B) The angle of incidence is less than the critical angle C) The angle of incidence exceeds the critical angle in a denser medium D) Light hits a mirror Answer: C
- Sound waves are: A) Transverse B) Electromagnetic C) Longitudinal D) Radio waves Answer: C
- The refractive index of glass is 1.5. Its critical angle is approximately: A) 42 degrees B) 90 degrees C) 1.5 degrees D) 60 degrees Answer: A
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
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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