If the light from a distance galaxy passes near a massive cosmic object, then the gravity of that object will distort space-time. That will cause the light to bend.
why roots of plant grow away from light
Auxins move from their source into the rest of the plant, where they stimulate cell elongation. A higher concentration of auxins accumulate in the shaded part of a stem and causes the plant to move towards the light.
According to Einestein's theory of general relativity, any massive body that causes an appreciable distortion in its surrounding space-time can bend light (e.g. large stars, black holes, etc.). Light that enters the event horizon of black holes are bent so much that it can never leave the black hole.
more the incoming light will be refracted (bend) in the material.
No, a light ray does not bend if it enters a glass block perpendicularly.
change of medium causes light to bend
refraction
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why roots of plant grow away from light
The change in speed causes the light to bend. If it is travelling from an optically dencer to an optically rarer medium the ray will bend away from the normal. But if it is travelling from an optically rarer to an optically denser medium then it will bend towards the normal.
false
refraction causes it to bend
this is called a tropism, where the growth of a plant in a particular stimulus, (light in this case). A chemical called auxin causes the elongation of cells. When a shoot is illuminated from one side, auxin is transported down the shaded side. This shaded side then elongates more rapidly than the illuminated side, causing the shoot to bend towards the light. Also the stimulus(light) must be detected by the tip of the plant shoot or root.
The change in speed causes the light to bend. If it is travelling from an optically dencer to an optically rarer medium the ray will bend away from the normal. But if it is travelling from an optically rarer to an optically denser medium then it will bend towards the normal.
Gravity. (Or the shape of space - which is molded by gravity.)
light rays bend away from normal as it passes from denser water to rarer air
light travels in straight path and when speed of medium in which light travels change then it refract due to change in speed light rays bend and refract