The focal length of the mirror used in head lamp:
Correct Answer: 250 mm
Description: Ans. is c i.e. 250 mm Head mirror is a concave mirror used to reflect light from the bull's eye lamp onto the pa being examined It has focal length of -- 25 cm (= 10 inch) The examiner sees through the hole in the centre of the mirror Diameter of central hole = 19 mm (3/4 inch)
Category:
Ophthalmology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now