Class 7 Science Light - Fill in the blanks - Worksheet 08
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Fill in the blanks with the words given in the box to complete the article on "IMAGE FORMATION".
[smaller, concave, infinity, same, convex, infinity, object, diverging, smaller, Spherical, parallel, focus, behind, behind, virtual, at, larger, obliquely, pole, transparent, finite, between, parallel, real, focus, virtual, focus, focus, converging]
__________________ lenses are the lenses formed by bounding two spherical ______________________ surfaces together. Spherical lenses formed by binding two spherical surfaces bulging outward are known as ____________ lenses while the spherical lenses formed by binding two spherical surfaces such that they are curved inward are known as ______________ lenses. Convex lenses are also known as ____________________ lens since the rays converge after falling on the convex lens while the concave lenses are known as __________________ lenses as the rays diverge after falling on the concave lens. In this article, we will learn about image formation by concave and convex lenses.
Guidelines for rays falling on the concave and convex lenses
When a ray strikes concave or convex lens __________________ at its ________, it continues to follow its path.
When a ray, ________________ to principle axis strikes concave or convex lens, the reflected ray passes through a __________ on the principle axis.
When a ray, passing through focus strikes concave or convex lenses, the reflected ray will pass ________________ to the principle axis.
Image Formation by Concave and Convex Lenses:
Convex Lenses
When an object is placed at ________________, the real image is formed at the __________. The size of the image is much ______________ as compared to that of the object.
When an object is placed ____________ the center of curvature, the ________ image is formed ______________ the center of curvature and focus. The size of the image is ________ as compared to that of the object.
When an object is ______ the center of curvature, the real image is formed at the other center of curvature. The size of the image is same as compared to that of the object.
When an object is placed in between the center of curvature and focus, the real image is the formed ____________ the center of curvature. The size of the image is ______________ as compared to that of the object.
When an object is placed at the __________, a real image is formed at ________________. The size of the image is much ____________ as compared to that of the object.
When an object is placed in between focus and pole, a ______________ image is formed. The size of the image is larger as compared to that of the ____________.
Concave Lenses
When an object is placed at infinity, a virtual image is formed at the __________. The size of the image is much smaller as compared to that of the object.
When an object is placed at a ____________ distance from the lens, a ______________ image is formed between pole and focus of the convex lens. The size of the image is smaller as compared to that of the object.