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प्रश्न
Which mirror will you prefer to use as a rear view mirror in a car : plane mirror or convex mirror? Give one reason.
उत्तर
A convex mirror is preferred as a rear view mirror because it has a wider field of view as compared to a plane mirror of same size.
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संबंधित प्रश्न
A small object is placed 150 mm away from a diverging lens of focal length 100 mm.
(i) Copy the figure below and draw rays to show how an image is formed by the lens.
Figure
(ii) Calculate the distance of the image from the lens by using the lens formula.
Define the following terms in the context of spherical mirrors :
(i) Pole
(ii) Centre of curvature
(iii) Radius of curvature
(iv) Principal axis
Define the terms focus and focal length of a concave mirror. Draw diagram to illustrate your answer.
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to the focus of mirror?
(b) State three characteristics of the image seen in part (a).
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
Define the term Centre of curvature.
The following figure shows a concave mirror with its pole (P), focus (F), and center of curvature (C). Draw a ray diagram to show the formation of the image of an object AB by the concave mirror.
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
