What type of lens is an air bubble inside the water

Hint: Behavior of lens depends upon the density of the medium in which light ray passes. When it passes from rare to denser or denser to rare medium, light ray bent towards normal or away from normal. So the path of light rays after entering the medium indicates the behavior of the lens. Complete step by step answer:When the light ray enters from water to air, it is refracted so that it deviates away from normal because light ray is entering from denser medium to rarer medium. Since air is optically rarer than water, the ray of light bends away from the normal at the point of incidence when moving from water to air while it bends towards the normal while moving from air to water. The normal at any point of a spherical bubble will pass through the center of the bubble. It is clearly visible that the air bubble acts as a ‘diverging lens’ (concave lens) in water. The refractive index of air, and The refractive index of water,. Since the water refractive index is greater than air, the air bubbles in the water will behave like a concave or diverging lens. Note:When light rays pass through the air bubble then the behavior of the air bubble acts as a concave lens. But in case of rain drop the ray enters at an angle to the normal due to which they get reflected completely and this phenomenon is called total internal reflection. So, we can say that medium in which rays travel plays a very important role. So the phenomenon of total internal reflection and nature of lenses is totally...

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19 An object 2 cm in size is placed 30cm in front of a concave mirror of focal length 15cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image? What will be the nature and the size of the image formed? Draw a ray diagram to show the formation of the image in this case. 20 A convex lens has a focal length of 10 cm. At what distance from the lens should the object be placed so that it forms a real and inverted image 20 cm away from the lens? What would be the size of the image formed if the object is 2 cm high? With the help of a ray diagram show the formation of the image by the lens in this case. 22 What is meant by power of a lens? Name and define its S.I. unit. One student uses a lens of focal length +50 cm and another of –50cm. State the nature and find the power of each lens. Which of the two lenses will always give a virtual, erect and diminished image irrespective of the position of the object?

Table of Contents • • • • • • • • • • Does the air bubble inside the water behave as concave or convex lens? The air has a refractive index of 1, whereas the water has the refractive index of 1.33. This means that the water is the denser medium and the air is the lighter medium. Therefore, the air bubble inside water behaves like a concave lens. How do convex lenses behave in water? behaves as converging lens when dipped in water. whereas it behaves as diverging lens when dipped in carbon disulphide. . Does air bubble shine in water? The air bubble in the water shines due to the phenomenon of total internal reflection. Complete answer: The air bubble shines since the speed of light is faster inside the air bubble than in the water and therefore the light gets reflected away from the bubble around just like the mirror. What happens when concave lens is dipped in water? The focus of a concave mirror is situated at a distance which is half of the radius of curvature of the mirror. When kept inside water, the laws of reflections are still valid, thus the focal length of the concave mirror does not change. Thus the focal length of the convex lens will increase. What type of lens is air bubble? Concave lens Inside water, the air bubble behaves like a Concave lens. The concave lenses are known as diverging lenses as the rays diverge after falling on the concave lens. What is concave lens also called? A concave lens is also known as a diverging lens because it is shaped round inwa...

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