The Electromagnetic Spectrum
Akopọ
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.
Awọn Afojusun
- 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
Àwòrán ọpọlọ
A ti ṣe àwòrán kókó yìí kí o lè rí bí àwọn èrò ṣe so pọ̀.
Ṣí àwòrán ọpọlọ nínú áàpù
Káàdì ìrántí
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Ṣe ìdánrawò káàdì wọ̀nyí nínú áàpù
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Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori The Electromagnetic Spectrum. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
The Electromagnetic Spectrum
Define the electromagnetic spectrum, and describe it in terms of frequencies and wavelengths
"Physics: The Electromagnetic Spectrum" 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/15-1-the-electromagnetic-spectrum. Access for free at https://openstax.org/books/physics/pages/1-introduction
Àwọn àjọ mìíràn ló tẹ̀ wọ́n jáde lábẹ́ ìwé àṣẹ ṣíṣí, a sì dá wọn lọ́lá bí wọ́n ṣe béèrè. Àwọn ìjápọ̀ ń ṣí ojú òpó wọn.
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa The Electromagnetic Spectrum? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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