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प्रश्न
_______ is a combination of two convex lenses with small focal length.
विकल्प
simple microscope
compound microscope
telescope
none of these
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उत्तर
Compound microscope is a combination of two convex lenses with small focal length.
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संबंधित प्रश्न
Study the given ray diagrams and select the correct statement from the following:
(A) Device X is a concave mirror and device Y is a convex lens, whose focal lengths are 20 cm and 25 cm respectively.
(B) Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 10 cm and 25 cm respectively.
(C) Device X is a concave lens and device Y is a convex mirror, whose focal lengths are 20 cm and 25 cm respectively.
(D) Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 20 cm and 25 cm respectively.
"A lens can form a magnified erect image as well as magnified inverted image of an object placed in front of it." State the nature of this lens and draw ray diagrams to justify the above statement. Mark the positions of O, F and 2F in the diagram.
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 90° (that is, perpendicular to the glass block).
A convex lens has a focal length of 10 cm. At which of the following positions should an object be placed so that this convex lens may act as a magnifying glass?
What type of images can a convex lens make?
A light ray does not bend at the boundary in passing from one medium to the other medium if the angle of incident is:
The given below figure shows an object OA and its image IB formed by a lens.
For which position of the object does a convex lens form a virtual and erect image? Explain with the help of a ray diagram.
What happens to the image formed by a convex lens if its lower part is blackened?
Can one bum a piece of paper in daylight by just using a convex lens instead of a match or any direct flame? Support your answer with the help of an appropriate ray diagram.
_______ times larger images can be obtained by using a simple microscope.
Simple microscope : Number of convex lens one : : compound microscope : _______
Find the odd one out and give its explanation.
Which of the following statements is true?
Distinguish between:
Concave lens and Convex Lens
Distinguish between:
Concave lens and Convex lens
