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प्रश्न
State any two uses of convex lenses.
उत्तर
Two uses of convex lenses are:
(1) They are used in telescopes.
(2) The convex lenses are used in magnifying glasses.They are used in the glasses of those affected with long-sightedness.
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संबंधित प्रश्न
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
Draw a labelled ray diagram to show the angle of incidence and the angle of refraction for a refracted ray of light.
List some things that convex lens and concave mirror have in common.
Which of the above two cases illustrates the working of a magnifying glass?
A convex lens of focal length 15 cm produces a magnification of +4. The object is placed:
(a) at a distance of 15 cm
(b) between 15 cm and 30 cm
(c) at less than 15 cm
(d) beyond 30 cm
What kind of lens can form:
an inverted magnified image?
A student places a 8.0 cm tall object perpendicular to the principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 30 cm. He obtains a sharp image of the object on a screen placed on the other side of the lens. What will be the nature (inverted, erect, magnified, diminished) of the image he obtains on a screen? Draw ray diagram to justify your answer.
State the nature and position of the object on the principal axis to obtain a real image of the same size
An object is placed in front of a convex lens such that the image formed has the same size as that of the object. Draw a ray diagram to illustrate this.
: Object near the lens : : ______ : 
