Electromagnetic Spectrum Continued
Akopọ
Every time you make a call, stream a film or use wireless internet, invisible electromagnetic waves are carrying your data through the air and along glass fibres. Different parts of the spectrum suit different jobs, and modern communications choose each one for a reason.
In this lesson you will learn how satellites, mobile phones, Bluetooth and optical fibres each use a particular band of electromagnetic radiation, and why. You will also meet digital and analogue signals and understand the real advantages that make digital signalling the modern standard.
Awọn Afojusun
- Know that communication with artificial satellites is mainly by microwaves: (a) s ome satellite phones use low orbit artificial satellites (b) some satellite phones and direct broadcast satellite television use geostationary satellites
- [Supplement] Know that many important systems of communications rely on electromagnetic radiation including: (a) m obile phones (cell phones) and wireless internet use microwaves because microwaves can penetrate some walls and only require a short aerial for transmission and reception (b) Bluetooth uses radio waves because radio waves pass through walls but the signal is weakened on doing so (c) optical fibres (visible light or infrared) are used for cable television and high-speed broadband because glass is transparent to visible light and some infrared; visible light and short wavelength infrared can carry high rates of data
- [Supplement] Know the difference between a digital and analogue signal
- [Supplement] Know that a sound can be transmitted as a digital or analogue signal
- [Supplement] Explain the benefits of digital signalling including increased rate of transmission of data and increased range due to accurate signal regeneration
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Electromagnetic Spectrum Continued. 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.
- Communication with artificial satellites is mainly by: A. radio waves B. microwaves C. ultraviolet D. gamma rays Answer: B
- Bluetooth uses radio waves because they: A. travel fastest B. pass through walls C. cannot be blocked D. carry the most data Answer: B
- Optical fibres carry data using: A. microwaves B. radio waves C. visible light or infrared D. X-rays Answer: C
- A digital signal uses: A. a continuously varying value B. only two values, 0 and 1 C. analogue regeneration D. no carrier wave Answer: B
- A benefit of digital over analogue signalling is: A. it travels faster than light B. it can be regenerated accurately, increasing range C. it needs no aerial D. it cannot carry sound Answer: B
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Electromagnetic Spectrum Continued? 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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