Lagnever AI English

Lens kya hai? Uttal aur avtal lens

Short mein jawab

Lens mudi sathon wala paardarshi kaanch ya plastic ka tukda hai. Beech mein mota uttal lens paas ki vastu ko seedha aur bada, door ki ko ulta dikhaata hai aur prakaash milaata hai. Kinaaron par mota avtal lens vastuon ko hamesha seedha aur chhota dikhaata hai aur prakaash failaata hai. Magnifier, chashme, camera aur aankh lens istemaal karte hain.

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Paani ki boond se lens

Samtal khidki ke kaanch se dekho to sab kuch usi size aur aakaar ka dikhta hai. Mudi paardarshi sateh isse badal deti hai. Saaf plastic ke scale par thoda tel ya mom ragdo, us par paani ki ek boond rakho, aur boond se chhape akshar dekho (Activity 10.8). Boond gol aur baahar ubhri hai, aur uske neeche ke akshar aas-paas waalon se bade dikhte hain. Boond ek saade lens ki tarah kaam kar rahi hai, bilkul magnifying glass ki tarah.

Lens paardarshi kaanch ya plastic ka aisa tukda hai jiski sathein mudi hon. Prakaash isse guzarta hai, isliye hum vastuein lens se hokar dekhte hain, darpan ki tarah usmein nahi.

Do tarah ke lens

  • Uttal lens kinaaron se beech mein mota hota hai.
  • Avtal lens beech se kinaaron par mota hota hai.
Uttal aur avtal lens, aur lens ki tarah kaam karti paani ki boond
Uttal aur avtal lens

Inse kya dikhta hai

Lens khada karo aur uske peechhe rakhi chhoti vastu ko door karte hue dekho (Activity 10.9).

  • Uttal lens se paas ki vastu seedhi aur badi dikhti hai. Door jaane par ulti dikhti hai, pehle badi phir chhoti.
  • Avtal lens se vastu hamesha seedhi aur chhoti dikhti hai, doori ke saath size badalta hai.
  • Samtal kaanch ki plate se wo waisi hi dikhti hai.

Pattern dekho: uttal lens avtal darpan jaisa, aur avtal lens uttal darpan jaisa vyavhaar karta hai.

Kaanch ki plate, uttal lens aur avtal lens se vastuein kaisi dikhti hain
Lens se pratibimb

Kirnpunj ko modna

Kaanch ki plate, phir har lens ko do kitaabon ke beech khada lagao aur torch aur kanghi se kai samaanaantar kirnein bhejo (Activity 10.10). Plate se kirnein seedhi nikal jaati hain. Uttal lens unhe paas laata hai, isliye ise milaane wala (converging) lens kehte hain; avtal lens unhe failaata hai, failaane wala (diverging) lens. Avtal darpan ki tarah uttal lens bhi dhoop ko itne garam bindu par ikattha kar sakta hai ki kaagaz jal jaaye (Activity 10.11). Suraj ko kabhi seedhe ya lens se mat dekho.

Kaanch ki plate, uttal lens aur avtal lens se samaanaantar kirnein
Lens se samaanaantar kirnein

Har jagah lens

Saaf dekhne mein madad karne wale chashme lens hain. Camera ke lens bhi, phone ke nanhe lens samet, aur doorbeen aur microscope ke lens bhi. Hamari apni aankh mein ek kamaal ka uttal lens hai jo aakaar badalta hai, jisse hum ek pal kitaab padh sakte hain aur agle pal door ki pahaadi dekh sakte hain. Paani bhara gilaas bhi lens ban sakta hai: uske peechhe rakhi pencil paani se hokar chaudi dikhti hai, kyunki gol gilaas aur paani milkar ek uttal lens jaisa kaam karte hain.

Hamare aas-paas ke lens: magnifier, chashme, camera, doorbeen, microscope aur aankh
Hamare aas-paas ke lens
Aadhe paani bhare gilaas ke peechhe pencil paani ki sateh ke neeche chaudi dikhti hai
Paani ke peechhe pencil

Lens ya darpan?

Darpan aur lens ke naam ek jaise hain par kaam alag. Darpan prakaash lautaata hai, isliye hum pratibimb darpan mein, apni hi taraf, dekhte hain. Lens prakaash ko guzarne deta aur modta hai, isliye hum vastu lens se hokar, doosri taraf, dekhte hain. Inke asar ek-doosre jaise hain: uttal lens aur avtal darpan dono prakaash milaate aur paas ki vastu badi dikha sakte hain, jabki avtal lens aur uttal darpan dono prakaash failaate aur cheezon ko hamesha chhota dikhaate hain.

Aur padho golaakaar darpan aur paraavartan ke niyam, ya Chapter 10 ke notes aur NCERT solutions dekho.

Practice karo

  1. Kinaaron se beech mein mota lens hai:

    1. (a) avtal lens
    2. (b) uttal lens
    3. (c) samtal kaanch
    4. (d) avtal darpan
    Jawab dekho

    Jawab: (b) uttal lens

  2. Avtal lens se vastuein hamesha kaisi dikhti hain?

    1. (a) ulti aur badi
    2. (b) seedhi aur chhoti
    3. (c) seedhi aur badi
    4. (d) barabar size ki
    Jawab dekho

    Jawab: (b) seedhi aur chhoti

  3. Uttal lens ko ye bhi kehte hain:

    1. (a) failaane wala lens
    2. (b) milaane wala lens
    3. (c) samtal lens
    4. (d) paraavartak lens
    Jawab dekho

    Jawab: (b) milaane wala lens

  4. Plastic ki patti par paani ki boond akshar bade kyon dikhaati hai?

    Jawab dekho

    Jawab: Boond ki sateh baahar ubhri hoti hai, isliye ye ek nanhe uttal lens ki tarah kaam karti hai. Isse dekhne par theek neeche ke akshar bade dikhte hain.

  5. Lens se Suraj ko kabhi kyon nahi dekhna chahiye?

    Jawab dekho

    Jawab: Uttal lens dhoop ko ek chhote bindu par ikattha karta hai jo kaagaz jala sakta hai. Aisi ikatthi dhoop aankh mein jaaye to aankh ko gambhir nuksaan ho sakta hai.

Students ke sawal

Lens kya hai?

Lens mudi sathon wala paardarshi kaanch ya plastic ka tukda hai. Darpan ke ulat ye prakaash ko guzarne deta hai aur raaste mein use modta hai, isliye hum vastuon ko lens se hokar dekhte hain, usmein nahi.

Uttal aur avtal lens mein kya antar hai?

Uttal lens beech mein mota hota hai; ye samaanaantar kirnon ko milaata hai aur paas ki vastuon ko seedha aur bada, door ki ko ulta dikhaata hai. Avtal lens kinaaron par mota hota hai; ye kirnon ko failaata hai aur vastuon ko hamesha seedha aur chhota dikhaata hai.

Lens kahan istemaal hote hain?

Magnifying glass, chashme, phone ke camera samet camera, doorbeen aur microscope mein. Hamari aankh mein bhi ek uttal lens hai jo apna aakaar badalta hai taaki hum paas ki kitaab aur door ki cheezein dono dekh sakein.

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