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प्रश्न
उत्तर
Choose a proper scale say, 4 cm = 1 cm. Mark the lens LPL' on the principal axis XX'. In front of the lens, Mark the object OA with distance OP = 24 cm and height of object OA = 4 cm.
For the object OA kept at a distance 24 cm in front of the convex lens of focal length 8 cm, the constuction of the image is shown in the figure. The distance PI of image IB, from the lens is 12 cm. thus the distance of image is 12cm. The image is real, inverted and dimnished(size 2.0 cm).
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संबंधित प्रश्न
A student has obtained a magnified image of a flame on a screen using a convex lens. To draw the corresponding ray diagram to show the image formation, which of the following two rays whose paths after refraction are shown, should he select ?
(A) I and II
(B) II and III
(C) III and IV
(D) I and III
If you focus the image of a distant object, whose shape is given below, on a screen using a convex lens, the shape of the image of this object on the screen would be:
(a)
(b)
(c)
(d)
In order to obtain a real image twice the size of the object with a convex lens of focal length 15 cm, the object distance should be:
(a) more than 5 cm but less than 10 cm
(b) more than 10 cm but less than 15 cm
(c) more than 15 cm but less than 30 cm
(d) more than 30 cm but less than 60 cm
The diagrams (a) and (b) in Figure below show the refraction of a monochromatic ray of light through a parallel sided glass block and a prism respectively. In each diagram, label the incident, refracted emergent rays and the angle of deviation.
The given below figure shows an object OA and its image IB formed by a lens.
A lens forms an upright and magnified image of an object. Name the lens.
(a) What type of a lens can be used as a magnifying glass?
(b) Show by a ray diagram the formation of a real image by simple magnifying lens.
State two applications of a convex lens.
_______ is a combination of two convex lenses with small focal length.
Find the odd one out and give its explanation.
