SELECT * FROM question_mgmt as q WHERE id=6114 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=11 AND subId=16 AND chapterId=475 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 7th science Light give one use each of a concave and a convex mirror

Question:

Give one use each of a concave and a convex mirror.

Answer:

Uses of Convex mirror:
1. Convex mirror are used as rear view mirrors or side view mirrors in vehicles (such as cars, scooters, buses and trucks etc) to see the traffic at the rear (back side) on the road.
2. Big convex mirrors are used as ‘shop security mirrors’.

Uses of Concave mirror:
1. Concave mirrors are used as shaving mirrors to see a large image of the face.
2. Concave mirrors are used by dentist to see the large images of teeth of patients.
3. Doctors use concave mirror reflectors to produce a parallel beam of light for examining the body parts such as eyes, ears, nose and throat.
4. Concave mirrors are used as reflectors in torches, headlights of vehicles (such as car, scooters, buses, trucks, train engines etc) and searchlights to get a strong, straight beam of light.


SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='11' AND subId='16' AND ex_no!=0 AND status=1 and id!=6114 ORDER BY views desc, last_viewed_on desc limit 0,10
SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='11' AND subId='16' AND ex_no!=0 AND status=1 and id!=6114 ORDER BY last_viewed_on desc limit 0,10

Comments

  • Answered by Ekta Mehta
  • 4 months ago

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  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.


  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.


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