Answer
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Hint:
-Rarer medium has less density than denser medium.
-When light rays travel from rarer medium to the denser medium the rays of light bend toward the center of the normal ray.
-When light rays travel from denser medium to the rarer medium the rays of light bend away from the center of the normal rays.
Complete step-by-step solution:
The lens is an optical device refracting medium bounded by the two surfaces, at least one of which is a curved surface. There are two types of lenses:
-Convex or converging lens: It is the combination of two plano-convex lenses where the plane side is joined together therefore, the center is thicker than the edges. Due to the refraction phenomenon, the light parallel beams converge through it.
-Concave or diverging lens: It is the combination of two plano-concave lenses where the plane sides are joined together therefore, the center is thinner than the edges. Due to the refraction phenomenon, the light parallel beams diverge through it.
-When light rays travel through the optical center then it will go in the same direction without any deviation (path change).
This is the required diagram.
Note:
-For a convex lens, it has a real focus.
-For a concave lens, it has a virtual focus.
-When light travels from rarer to the denser medium, the image formed is real.
-When light travels from denser to the rarer medium, the image formed is virtual.
-The direction of light in which it travels is always taken as positive and the opposite direction of light is taken as a negative value.
-Rarer medium has less density than denser medium.
-When light rays travel from rarer medium to the denser medium the rays of light bend toward the center of the normal ray.
-When light rays travel from denser medium to the rarer medium the rays of light bend away from the center of the normal rays.
Complete step-by-step solution:
The lens is an optical device refracting medium bounded by the two surfaces, at least one of which is a curved surface. There are two types of lenses:
-Convex or converging lens: It is the combination of two plano-convex lenses where the plane side is joined together therefore, the center is thicker than the edges. Due to the refraction phenomenon, the light parallel beams converge through it.
-Concave or diverging lens: It is the combination of two plano-concave lenses where the plane sides are joined together therefore, the center is thinner than the edges. Due to the refraction phenomenon, the light parallel beams diverge through it.
-When light rays travel through the optical center then it will go in the same direction without any deviation (path change).
This is the required diagram.
Note:
-For a convex lens, it has a real focus.
-For a concave lens, it has a virtual focus.
-When light travels from rarer to the denser medium, the image formed is real.
-When light travels from denser to the rarer medium, the image formed is virtual.
-The direction of light in which it travels is always taken as positive and the opposite direction of light is taken as a negative value.
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