A concave lens is used in:
A concave lens is used in:
अवतल लेंस का उपयोग किसमें किया जाता है?
Detailed Solution & Logic
Glasses for myopia (short-sightedness)/दृष्टिदोष (मायोपिया) के चश्मे
Explanation / व्याख्या
A concave lens is a diverging lens. It spreads light rays outward, helping to correct myopia (short-sightedness), where a person can see nearby objects clearly but distant objects appear blurry.
अवतल लेंस एक अपसारी (diverging) लेंस होता है। यह प्रकाश किरणों को फैलाता है। इसका उपयोग मायोपिया (निकट दृष्टिदोष) को ठीक करने में किया जाता है, जिसमें व्यक्ति पास की वस्तुएँ तो साफ देखता है लेकिन दूर की वस्तुएँ धुंधली दिखाई देती हैं।
Key Facts / महत्वपूर्ण तथ्य
- 👁️ Used in myopia correction (निकट दृष्टिदोष)
- 🌈 Forms virtual, erect, and diminished image
- 🔦 Diverges light rays (प्रकाश को फैलाता है)
❌ Why others are incorrect / अन्य विकल्प गलत क्यों हैं
- 🔭 Telescope / दूरबीन: Uses convex lenses and mirrors
- 📽️ Projector / प्रोजेक्टर: Uses convex lens to magnify image
- 📷 Camera / कैमरा: Uses convex lens to focus light on sensor
Simple trick / याद रखने का तरीका
👉 “Concave lens = Myopia (दूर की चीज़ धुंधली) → दूर देखने में मदद”
Similar Practice Questions
When an object is placed in a fluid, it feels an upward force called buoyancy
When an object is placed in a fluid, it feels an upward force called buoyancy....
Select the correct option regarding the following two statements labelled Assertion (A) and Reason (R).
Select the correct option regarding the following two statements labelled Assertion (A) and Reason (R)....
The velocity-time graph of a particle moving with uniform acceleration is a:
The velocity-time graph of a particle moving with uniform acceleration is a: एकसमान त्वरण से...
Which of the following are generally sensitive to touch and help plants in climbing?
Which of the following are generally sensitive to touch and help plants in climbing? निम्नलिखित...
In mitochondria, a rich amount of enzymes and carriers are present on:
In mitochondria, a rich amount of enzymes and carriers are present on: माइटोकॉन्ड्रिया में एंजाइम और...
Complex tissues are made up of:
Complex tissues are made up of: जटिल ऊतक किससे मिलकर बने होते हैं?
Which of the following is a unique characteristic
Which of the following is a unique characteristic of sponges (Phylum porifera)? निम्नलिखित में से...