Question
Can light travel in vacuum ?
✓
Answer
Yes, light can travels in vacuum or air, a distance of nearly 299, 792, 458 metre (or nearly 3 x 108 metre) in one second. Thus, the speed of light in vacuum (or air) is 3 x 108 m s’1 nearly.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
How does the density of water changes when it is heated from 4°C to 10°C ?
Given below statement is incorrect. Write the correct statement :
Stars are non-luminous body.
Stars are non-luminous body.
Name the process during which steam (gas) changes into water (liquid).
Given below stament is incorrect. Write the correct statement :
Cooking gas is sold by volume.
Cooking gas is sold by volume.
Write some other factors on which the loudness of a sound depends.
The outer case of the bell in a temple is made big. Give a reason.
Speed and velocity have the same units yet they are different physical quantities. Why?
Given below statement is incorrect. Write the correct statement :
A stone thrown upward at an angle describes rectilinear motion.
A stone thrown upward at an angle describes rectilinear motion.
What do you understand by the term “standard points of a thermometer?
Name the device used in the given figure.