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प्रश्न
Explain why, concave mirrors are used as shaving mirrors.
उत्तर
Concave mirrors are used as shaving mirrors to view a magnified image of the face. The reason being, an enlarged image of the face is seen when it is held within the focus of a concave mirror.
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संबंधित प्रश्न
If the image formed by a mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it? Draw a ray diagram to justify your answer. Where and why do we generally use this type of mirror?
It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm.
Will the image be smaller or larger than the object? Draw ray diagram to show the formation of image in this case.
State two positions in which a concave mirror produces a magnified image of a given object. List two differences between the two images.
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?
A concave mirror produces three times magnified image on a screen. If the object is placed 20 cm in front of the mirror, how far is the screen from the object.
Which type of mirror is used by a dentist?
Make labelled ray diagrams to illustrate the formation of:
a real image by a converging mirror.
Give two uses of concave mirrors. Explain why you would choose concave mirrors for these uses.
With the help of a labelled diagram, explain how a concave lens diverges a beam of parallel light rays. Mark the principal axis, optical centre, principal focus and focal length of the concave lens on the diagram.
Complete the following diagrams in figure by drawing the reflected rays for the incident rays 1 and 2 if F is the focus and C is the centre of curvature.
