Electromagnetic Spectrum Continued
Bayani Gaba-gaba
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.
Manufura
- 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
Takardar Darasi
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Nazarin Darasi
Barka da kammala darasi akan Electromagnetic Spectrum Continued. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- 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
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Electromagnetic Spectrum Continued? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
