Advertisements
Advertisements
Question
State whether light slows down or speeds up in the following cases :
Light going from water to air.
Advertisements
Solution
Speeds up
APPEARS IN
RELATED QUESTIONS
Select the correct alternative
The speed of light is maximum in
A light ray passes from water to
- air, and
- glass.
In each case, state how does the speed of light change.
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.
Numerical problem.
Light enters from air into a glass plate having refractive index 1.5. What is the speed of light in glass? (Ans: 2 × 108 ms–1)
Light travels ______ kilometers per second in air or vacuum. In theory, nothing can travel faster than light.
Objects that allow light to pass through partially are called ______ material.
Define opaque material.
The speed of light decreases in a denser medium, light bends towards the normal.
Two medium with a refractive index of 1.31 & 1.50 is given. In which case
- The bending of light is more and
- speed of light is more.
Light travels a distance of '10x' units in time 't1' in vacuum and it travels a distance of 'x' units in time 't2' in a denser medium. Using this information answer the question that follows:
'Light covers a distance of '20x' units in time 't1' in diamond'. State true or false.
