Physics
Grade-7
Easy
Question
The spherical lenses are able to converge or diverge the light rays entering them by virtue of ____.
- Reflection of light
- Absorption of light
- Refraction of light
- Dispersion of light
The correct answer is: Refraction of light
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What kind of images does a concave lens form?
What kind of images does a concave lens form?
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A lens can always form both real and inverted and virtual and upright images of an object placed in front of it. It is a ____ lens.
A lens can always form both real and inverted and virtual and upright images of an object placed in front of it. It is a ____ lens.
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A magnifying glass is placed in the path of sun rays, and a sharp point-sized image of the Sun is obtained on a paper placed on the other side of the magnifying glass. This image is formed at the ___ of the glass.
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When a parallel beam of light falls on a surface of a concave lens it ____ the rays of light in such a way that they appear to originate from a point called ____.
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In the setup shown in the picture below, the sun rays are focused on a paper by a magnifying glass, which results in the paper catching fire. If the magnifying glass was replaced by a concave lens, the paper does not catch fire. Why?
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A lens can only form a virtual, upright, and diminished images irrespective of the distance between the lens and the object. It is a ____ lens.
A lens can only form a virtual, upright, and diminished images irrespective of the distance between the lens and the object. It is a ____ lens.
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A concave lens forms a virtual, upright, and diminished image of an object ____.
A concave lens forms a virtual, upright, and diminished image of an object ____.
PhysicsGrade-7
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The lens of a pair of spectacles used by a person is thinner in the middle and thicker towards the edges. The lens used in the spectacles is ____.
The lens of a pair of spectacles used by a person is thinner in the middle and thicker towards the edges. The lens used in the spectacles is ____.
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What kind of images does a convex lens not form?
What kind of images does a convex lens not form?
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A lens always forms a virtual, upright, and diminished image of an object placed in front of it. It is a ____ lens.
A lens always forms a virtual, upright, and diminished image of an object placed in front of it. It is a ____ lens.
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A light ray bends ____ on emerging from a ____.
A light ray bends ____ on emerging from a ____.
PhysicsGrade-7
