Science (Physics, Chemistry, Biology) & Maths
Akriti’s Physics Questions
On 15th Feb 2010 Akriti Srivastava wrote:
Good Evening sir,
Refer to the diagram to the left.
Due to refraction, the ray of light traveling from the object placed under the glass block moves out of the normal after it gets into the rarer medium (air outside the glass block in this case). This phenomenon is called refraction.
The refracted ray when produced backwards meets the normal ray at a point vertically above the original object. When you view the object from above, you feel that the object has come nearer to you. This is called the apparent position of the object and the distance by which it appears to move above is called the apparent displacement.
In your question the print is the object described above.
2) This phenomenon occurs due to internal reflection.
In the above diagram, the sun is below the horizon. The rays from sun get internally reflected by the upper strata of the atmosphere which is denser. Due to this internal reflection, the sun seems to rise before it actually rises and seems to stay longer after it has already set.
3) Same explanation as Q1.
4) This means that the ratio of speed of light in vacuum to the speed of light through the glass is in the proportion of 3:2.