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question_answer1) An object is placed at a distance of 20 cm in front of a plane mirror. If the mirror moves towards the object by a distance of 20 cm, then find the displacement of the image.
question_answer2) An object is placed at a certain distance in front of a plane mirror. If both object and plane mirror moves towards each other through a distance of 15 cm, then find the distance through which the image moves.
question_answer3) If both object and mirror moves away from each other with a speed of 20 m/s, then find (a) The speed of the image (b) Speed of the image with respect to object (c) Speed of the image with respect to mirror.
question_answer4) Two mirrors are inclined at a certain angle \[\theta \]. If a light ray is incident on the first mirror parallel to the second mirror and reflected from the second parallel to the first mirror, then find the value of \[\theta \].
question_answer5) A man 180 cm high stands in front of a plane mirror. His eyes are at a height of 170 cm from the floor. Then the minimum length of plane mirror for him to see his full image is ____.
question_answer6) A concave mirror produces a real image twice the size of the object when placed at a distance of 22.5 cm from it. At what distance from the mirror should the object be placed so that the real image becomes three times the size of the object?
question_answer7) Two plane mirrors are inclined to each other at an angle of \[{{70}^{o}}\]. A ray is incident on one mirror at an angle \[\theta \]. The rays reflected from this mirror fall on the second mirror from where it is reflected parallel to the first mirror. What is the value of \[\theta \] ?
question_answer8) Two plane mirrors are inclined at an angle of \[{{60}^{o}}\] as shown in the figure. A ray of light parallel to Mirror 1 strikes the Mirror 2. At what angle will the ray finally emerge?
question_answer9) A needle 1.5 cm is placed at a distance of 20 cm from a concave mirror of focal length 15 cm. At what distance from the mirror should a screen be placed in order to receive a sharp image.
question_answer10) Two plane mirrors are placed parallel to each other. The distance between the mirrors is 10 cm. An object is placed between the mirrors at a distance of 4 cm from one of them, say\[{{M}_{1}}\]. What is the distance between the first image at \[{{M}_{1}}\]and the second image formed at\[{{M}_{2}}\]?
question_answer11) A plane mirror is moved away from a stationary object with a speed of 20 cm/s. What is the speed of the image?
question_answer12) Show that the length of a plane mirror in which a person can see his fall image is half the height of the person.
question_answer13) (i) We have a spherical mirror. The image of an object placed in front of this mirror is virtual. If the position of the object is changed, the 2 image still remains virtual and erect. Is the spherical mirror concave or convex? (ii) We have a mirror. The image of an object placed in front of the mirror always forms on the other side of the mirror. If the position of the object is changed, the nature and the 3 magnification remains unchanged. Identify the type of the mirror. (iii) The image of an object placed in front of a spherical mirror is virtual. As the object distance is decreased infinity to focal length, l the size of the inverted image increases. Is the spherical mirror concave or convex?
question_answer14) A convex and a concave mirror of radii 10 cm each are placed facing each other and 15 cm apart. An object is placed mid way between them. Find the position, nature and size of the final image for reflections first at concave mirror and then at convex mirror.
question_answer15) A convex lens of focal length 15 cm is placed in , front of a convex mirror coaxially at a distance of 5cm from the pole of the mirror. When an object is placed at a distance of 20 cm from the lens, it is found that the image coincided with the object. Find the radius of curvature of the mirror.
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