Physics
A small air bubble in a glass block when seen from above appears to be raised because of:
- refraction of light
- reflection of light
- reflection and refraction of light
- none of the above
Answer
refraction of light
Reason — When you look at a small air bubble in a glass block from above, the light rays coming from the air bubble bend as they pass from the denser medium (glass) to the less dense medium (air). This bending of light causes the apparent position of the air bubble to be shifted, making it appear raised or displaced from its actual position. Therefore, the apparent displacement of the air bubble is due to the refraction of light.
Related Questions
What should be the angle of incidence for a ray of light which suffers minimum deviation of 36° through an equilateral prism?[ Hint — A = 60° and i = ( A + δmin ) / 2 ]
Refractive index of a liquid can be found using :
- μ = real depth x apparent depth
- μ = apparent depth/real depth
- μ = real depth/apparent depth
- none of the above
An object in a denser medium when viewed from a rarer medium appears to be raised. The shift is maximum for:
- red light
- violet light
- yellow light
- green light
The shift by which an object appears to be raised depends on:
- the refractive index of the medium
- the thickness of denser medium
- the wavelength of incident light
- all of the above