The Electromagnetic Spectrum
Gbogbo ọrọ náà
Your eyes are extraordinary instruments, and they are also very nearly blind. The light they detect is a sliver of a much wider family of waves that fills the room you are sitting in right now: radio signals, the warmth from a radiator, the ultraviolet slipping through the window.
This lesson sets out the seven regions of the electromagnetic spectrum in order, shows what each one is used for, and explains why the same family that lets a surgeon see a broken bone can also give you skin cancer if you treat it carelessly.
Ebumnobi
- Know that light is part of a continuous electromagnetic spectrum that includes radio, microwave, infrared, visible, ultraviolet, x-ray and gamma ray radiations and that all these waves travel at the same speed in free space
- Know the order of the electromagnetic spectrum in terms of decreasing wavelength and increasing frequency, including the colours of the visible spectrum
- Explain some of the uses of electromagnetic radiations, including radio waves, microwaves, infrared, visible light, ultraviolet, x-rays and gamma rays
- Explain the detrimental effects of excessive exposure of the human body to electromagnetic waves and describe simple protective measures against the risks
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 The Electromagnetic Spectrum. 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.
- Which of the following lists the electromagnetic spectrum in order of decreasing wavelength? A) Gamma, X-ray, ultraviolet, visible, infrared, microwave, radio B) Radio, microwave, infrared, visible, ultraviolet, X-ray, gamma C) Radio, infrared, microwave, visible, X-ray, ultraviolet, gamma D) Visible, infrared, radio, microwave, ultraviolet, X-ray, gamma Answer: B
- In free space, all electromagnetic waves have the same: A) wavelength B) frequency C) speed D) energy Answer: C
- Which colour of visible light has the shortest wavelength? A) Red B) Green C) Blue D) Violet Answer: D
- Which region of the spectrum is used in thermal imaging cameras? A) Radio waves B) Infrared C) Ultraviolet D) Gamma rays Answer: B
- Excessive exposure to ultraviolet radiation is most likely to cause: A) internal heating of tissue B) skin cancer and eye damage C) no harmful effects D) broken bones Answer: B
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 The Electromagnetic Spectrum? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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