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Waxaan sharxi karaa sida iftiinka ka yimaada shay uu muraayad isku-urursan (converging lens) ugu diiradda saaro si uu u sameeyo sawir.

Hordhac

Darsigan wuxuu ku saabsan yahay sida muraayadaha (lenses) ay iftiinka u diiradda saaraan si ay u sameeyaan sawir. Waa qayb ka mid ah cutubka 'Making Images'. Waa inaad hore u garanaysaa in iftiiku toos u socdo iyo in muraayaduhu ay iftiinka u leexin karaan.

Muuji qoraalka
Some of the light from objects can pass through a lens and become focused to form an image on a screen. Some light from every point on an object passes through every part of a lens. A convex lens refracts light rays so they travel more towards each other. A point where rays meet is called a focus. All the rays from one point on the object are focused to the same point, forming the corresponding part of the image. The shape of a converging lens refracts (bends) light more at the edges than near to the centre.

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Imtixaannada

  1. 1. Deeqaan, kee mid ka mid ah hadalladan ayaa sax ah?

    • Jawaabta saxda ah:Dhibic kasta oo ka mid ah shay ifaya (luminous) ayaa iftiin u soo saara dhamaan jihooyinka.
    • Dhibic kasta oo ka mid ah shay ifaya ayaa iftiin u soo saara hal jiho oo kaliya.
    • Dhibic kasta oo ka mid ah shay aan ifayn (non-luminous) ayaa iftiin ka celiya dhamaan jihooyinka.
    • Dhibic kasta oo ka mid ah shay aan ifayn ayaa iftiin ka celiya hal jiho oo kaliya.

  2. 2. Arday ayaa qabtay shaashad (screen) oo u jeediyay dayaxa buuxa habeenkii. Kee ayaa ka mid ah kuwan soo socda sharaxaya sababta aan sawirka dayaxa uga soo bixin shaashadda?

    • Iftiin ka yimid dayaxa kuma dhaco shaashadda.
    • Laamaha iftiinka ee ku dhacaya shaashadda waa kuwo aan dhab ahayn (virtual).
    • Jawaabta saxda ah:Iftiin ka yimid qayb kasta oo dayaxa ah wuxuu ku dhacaa qayb kasta oo shaashadda ah.
    • Barta kasta oo shaashadda ah waxaa ku dhaca iftiin ka yimid hal bari oo dayaxa ah.

  3. 3. Ifaydh ka imanaya hawada wuxuu galaa dhagax weyn oo galaas ah, laakiin ma leexanayo (refracted). Kee ayaa ka mid ah jawaabahan hoose sharxaya arrintan?

    • Gudbinta iyo leexashada isla mar kama dhacaan.
    • Jawaabta saxda ah:Ifaydhu wuxuu la kulmaa galaaska isagoo ku socda tooska (normal) ee dusha galaaska.
    • Ifaydhu wuxuu la kulmaa galaaska isagoo 90° ka leexanaya tooska (normal) ee dusha galaaska.
    • Leexashadu ma dhacdo marka iftiin ka yimaado hawada oo u gudbo adke.

  4. 4. Iftiinku wuxuu ka gudbaa xadka hal shay ilaa mid kale. Kee mid ka mid ah weedhahan ayaa sax ah?

    • Jawaabta saxda ah:Marka uu weynaado xagasha u dhaxaysa iftiinka iyo xariiqda toosan (normal), waa in badan yahay leexashadiisa (refraction).
    • Marka uu yaraado xagasha u dhaxaysa iftiinka iyo xariiqda toosan (normal), waa in badan yahay leexashadiisa (refraction).
    • Xagasha u dhaxaysa iftiinka iyo xariiqda toosan (normal) ma saameyso inta uu leexanayo (refraction).

  5. 5. Jaantusyada soo socda, kee baa si sax ah u muujinaya iftiinka oo jajaban (refracting) marka uu dhex marayo baloog leydi ah?

    • Jaantuska koowaad
    • Jaantuska labaad
    • Jawaabta saxda ah:Jaantuska saddexaad
    • Jaantuska afraad

  1. 1. Kee ka mid ah hadallada soo socda ee ku saabsan sawirada lagu sameeyo shaashadda lenska convex (isku-urura) waa sax?

    • Lens weyni wuxuu soo saaraa sawir weyn.
    • Sawirka waa la rogi karaa marka lenska la leexiyo.
    • Sawirku had iyo jeer waa isla cabbirka shayga.
    • Jawaabta saxda ah:Sawirku had iyo jeer waa rogan marka loo barbardhigo shayga.

  2. 2. Ardaygu wuxuu rabaa inuu isticmaalo muraayad (lens) si uu sawirka shay ifaya ugu soo saaro shaashad. Meeday ardaygu saari karaa shaashadda si uu u arko sawir cad?

    • meel u dhigma masaafada fogaanta (focal distance) ee muraayadda
    • ka dhow muraayadda marka loo eego masaafada fogaanta
    • ka fog muraayadda marka loo eego masaafada fogaanta
    • Jawaabta saxda ah:waxay ku xidhan tahay masaafada u dhaxaysa muraayadda iyo shayga.

  3. 3. Markan lensku awood badnaan yahay, dhererka fogaanta uu diiradda saaro (focal length) wuu gaaban yahay. Mid ka mid ah isbeddelladan soo socda ayaa lenska ka dhigi kara mid awood badan?

    • Jawaabta saxda ah:lenska ka dhigista mid ballaadhan (qalloocan badan)
    • lenska ka dhigista mid khafiif ah (qalloocan yar)
    • lenska ka samaynta walax (material) iftiinka si yar u leexinaysa
    • lenska ka samaynta walax (material) iftiinka si badan u leexinaysa

  4. 4. Jaantusku wuxuu muujinayaa lens oo iftiinka geedka ku soo ururinaya. Saddex ka mid ah fallaadhaha ayaa la muujiyay. Meesha lambarka lagu calaamadeeyay ee sawirku ka samaysmo waa kee?

    • A
    • B
    • C
    • Jawaabta saxda ah:D
    • E

  5. 5. Maxaa dhacaya marka lens uu sameeyo sawir shay?

    • Dhammaan fallaadhaha ka imanaya hal meel oo shayga ah waxay maraan isla qaybta lens-ka.
    • Jawaabta saxda ah:Dhammaan fallaadhaha ka imanaya hal meel oo shayga ah waxay gaadhaan isla meesha sawirka.
    • Fallaadhaha ka imanaya dhammaan meelaha shayga waxay maraan qayb kasta oo lens-ka ah.
    • Fallaadhaha ka imanaya dhammaan meelaha shayga waxay gaadhaan isla meesha sawirka.

  6. 6. Sawirku wuxuu muujinayaa muraayad (lens) qaabka convex ah. Kee ka mid ah weedhahan ku saabsan muraayadda ayaa sax ah?

    • Qaybaha muraayadda oo dhami waxay u jajabiyaan (refract) iftiinka si isku mid ah.
    • Qaybta ugu dhumucda badan ee muraayadda ayaa u jajabisa iftiinka si xooggan.
    • Jawaabta saxda ah:Qaybaha ugu khafiifsan ee muraayadda ayaa u jajabiya iftiinka si xooggan.

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