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RRB Junior Engineer / DMS / CMA 2019 · Question 3637 of 3719

In which of the following is a convex mirror used?

  1. AShaving mirror
  2. BDentist's mirror
  3. CVehicle's headlight
  4. DRear-view mirrorCorrect

Answer: D. Rear-view mirror

Explanation

Explanation: The rearview mirrors of the vehicle should produce diminished, virtual and erect images. The mirror in the rearview is a convex mirror that provides. Convex mirrors bulge outwards and provide a wide field of view. Uses of Convex Mirror : hallways of buildings stores, schools, hospitals used automated teller machines as a handy security feature that allows users to see what all is happening behind them. A convex mirror is used as a rearview mirror. A concave mirror reflects the light falling on it to one focal point thus creating a reflective image of the object. A concave mirror is used in Headlights, Shaving mirrors, Dentist's mirrors and Torches. Additional Information Concave Mirror Explanation As a Shaving mirror Concave mirrors at less distance produced magnified, upright images, therefore, are used as a shaving mirror In Headlights In case of headlights and searchlights, the light should not scatter and instead should be a parallel beam so that it can cover a longer distance. For this purpose, concave mirrors are used because a parallel beam of light is produced when the light source is placed at the focus of a concave mirror. In Torches Concave mirrors reflect the light inward to one focal point and they are used to focus light.

Source: RRB JE 2019 (CBT 2) (IT) Previous Year Paper (30 Aug 2019) — prepp.in solved-paper PDF (answer key with explanations) · reliable-secondary

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