Advertisements
Advertisements
प्रश्न
Compare the speeds of light of wavelength 4000 Å (i.e. violet light) and 8000 Å (i.e. red light) in vacuum.
Advertisements
उत्तर
Speed of light depends on medium not on wavelength hence speed will be same for both.
APPEARS IN
संबंधित प्रश्न
Select the correct alternative
The speed of light is maximum in
State whether light slows down or speeds up in the following cases :
Light going from air to glass.
State whether light slows down or speeds up in the following cases :
Light going from water to air.
A light ray passes from water to
- air, and
- glass.
In each case, state how does the speed of light change.
A light ray suffers reflection and refraction at the boundary in passing from air to water. Draw a neat labelled ray diagram to show it.
The speed of light in air is 3 × 108 m s-1. Calculate the speed of light in glass. The refractive index of glass is 1.5.
Light travels ______ kilometers per second in air or vacuum. In theory, nothing can travel faster than light.
Materials that are not able to allow light to pass through, are called ______ material.
Define transparent materials.
The speed of light decreases in a denser medium, light bends towards the normal.
