mention 3 use of concave mirror
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Answer:
(1) Concave mirrors are commonly used in torches, searchlights and headlights of vehicles to get powerful parallel beams of light.
(2) People are used as shaving mirrors to see a larger image of the face.
(3) Dentists use concave mirrors to view large images of the teeth of the patients.
shaving mirrors
Concave mirrors are most commonly used in shaving because of their reflective and curved surface. During shaving, the concave mirror forms an enlarged and erect image of the face when the mirror is held closer to the face.
head mirror
Concave mirrors are also used by E.N.T. specialist. They put the concave mirror on their patient’s forehead. When the light rays from the light source are reflected from the concave mirror, it is focused on the ear, nose, or throat of the patient making the infected parts more visible.
ophthalmoscope
Concave mirrors are used in optical instruments such as Ophthalmoscope. Ophthalmoscope consists of a concave mirror with a hole in the center. The doctor focuses through the small hole from behind the concave mirror while a light beam is directed into the pupil of the patient’s eye. This makes the retina visible and makes it easy for doctors to check.
astronomical telescopes
Concave mirrors are also used in making astronomical telescopes. In an astronomical telescope, a concave mirror of a diameter of 5 meters or more is used as the objective.
headlights
Concave mirrors are widely used in headlights of automobiles and motor vehicles, torchlights, railway engines, etc. as reflectors. The light source is placed at the focus of the mirror, so after reflecting the light rays travel over a huge distance as parallel light beams of high intensity.