A ray of light is travelling from a glass block into the surrounding air. Its angle of incidence onto the boundary between the glass and the air is equal to 20°. What can be said about its angle of refraction as it travels from the glass into the surrounding air?It will be equal to 20°It will be less than 20°It will be greater than 20°It is impossible to say2A light ray is traveling from air into a rectangular glass block. It is normally incident onto the glass-air boundary (in other words, it is travelling along the normal as it strikes the surface of the glass). What can be said about its angle of refraction as it travels into the glass block?It is impossible to sayIt will be equal to 0°It will be equal to 180°It will be equal to 90°3A ray of light is travelling from air into water at an angle of incidence of 50°. What can be said about its angle of refraction as it travels into the water?It will be equal to 50°It will be less than 50°It is impossible to sayIt will be greater than 50°4Some waves in a lake are travelling from shallow water into deep water. They are striking the boundary between the shallow and deep water at an angle to the normal. What will happen to the waves as they travel from the shallow water into the deep water?They will refract away from the normalIt is impossible to say without knowing the wavelength and speed of the wavesThey will not refract and will continue moving in their original direction of motionThey will refract towards the normal
Question
A ray of light is travelling from a glass block into the surrounding air. Its angle of incidence onto the boundary between the glass and the air is equal to 20°. What can be said about its angle of refraction as it travels from the glass into the surrounding air?It will be equal to 20°It will be less than 20°It will be greater than 20°It is impossible to say2A light ray is traveling from air into a rectangular glass block. It is normally incident onto the glass-air boundary (in other words, it is travelling along the normal as it strikes the surface of the glass). What can be said about its angle of refraction as it travels into the glass block?It is impossible to sayIt will be equal to 0°It will be equal to 180°It will be equal to 90°3A ray of light is travelling from air into water at an angle of incidence of 50°. What can be said about its angle of refraction as it travels into the water?It will be equal to 50°It will be less than 50°It is impossible to sayIt will be greater than 50°4Some waves in a lake are travelling from shallow water into deep water. They are striking the boundary between the shallow and deep water at an angle to the normal. What will happen to the waves as they travel from the shallow water into the deep water?They will refract away from the normalIt is impossible to say without knowing the wavelength and speed of the wavesThey will not refract and will continue moving in their original direction of motionThey will refract towards the normal
Solution
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The angle of refraction will be greater than 20°. This is because light speeds up when it moves from a denser medium (glass) to a less dense medium (air), causing it to refract away from the normal.
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The angle of refraction will be equal to 0°. When light is incident normally (at 90° to the surface), it will continue in the same direction without any refraction.
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The angle of refraction will be less than 50°. Light slows down when it moves from a less dense medium (air) to a denser medium (water), causing it to refract towards the normal.
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The waves will refract away from the normal. This is because waves speed up when they move from shallow water (a slower medium) to deep water (a faster medium), causing them to refract away from the normal.
Similar Questions
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