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प्रश्न
Draw a ray diagram to show the formation of a real magnified image by a convex lens. (In your sketch the position of object and image with respect to the principal focus of lens should be shown clearly).
उत्तर
A convex lens forms a real and magnified image when an object is placed between F and 2F.
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संबंधित प्रश्न
To determine the approximate focal length of the given convex lens by focussing a distant object (say, a sign board), you try to focus the image of the object on a screen. The image you obtain on the screen is always
(a) erect and laterally inverted
(b) erect and diminished
(c) inverted and diminished
(d) virtual, inverted and diminished
An object is placed at a distance of 15 cm from a concave lens of focal length 30 cm. List four characteristics (nature, position, etc.) of the image formed by the lens.
Draw a labelled ray diagram to show how a ray of light passes through a parallel sided glass block:
if it hits the glass block at an angle other than 90° (that is, obliquely to the glass block).
List some things that convex lens and concave mirror have in common.
Which type of lenses are:
thicker in the middle than at the edges?
A convex lens forms an image of an object equal to the size of the object. Draw a diagram to illustrate it.
Where must a point source of light be placed in front of a convex lens so as to obtain a parallel beam of light?
Point out the difference between a convex lens and a concave lens.
Differentiate convex lens and concave lens.
- In which type of microscope do you find the lens arrangement as shown in the following diagram?
- Write about the working and the use of this microscope.
