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प्रश्न
The focal length of a thin convex lens is ______ than that of a thick convex lens.
उत्तर
The focal length of a thin convex lens is more than that of a thick convex lens.
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संबंधित प्रश्न
Draw a ray diagram to show the formation of image in the above situation
One-half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.
An object 5 cm is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position, nature and size of the image.
A beam of light travelling in a rectangular glass slab emerges into air. Draw a ray-diagram indicating the change in its path.
Fill in the following blank with suitable word:
The image in a convex lens depends upon the distance of the ........... from the lens.
An object 3 cm high is placed 24 cm away from a convex lens of focal length 8 cm. Find by calculations, the position, height and nature of the image.
In the following cases, where must an object be placed in front of a convex lens so that the image formed is of the same size as the object?
i. Which type of microscope has the arrangement of lenses shown in the adjoining figure?
ii. Label the figure correctly.
iii. Write the working of this microscope.
iv. Where does this microscope used?
v. Suggest a way to increase the efficiency of this microscope.
Define the principal focus of a convex lens.
: Object near the lens : : ______ : 
