The velocity of laser light is___________________?
Correct answer: C. Equal to ordinary light
- A. Less than ordinary light
- B. More than ordinary light
- C. Equal to ordinary light
- D. Different for different colours or frequency
Explanation
Laser light is electromagnetic radiation, so in vacuum it travels at the same speed as ordinary light, approximately 3.0 x 10^8 m/s. A student may choose different for different colours because frequency and wavelength change with colour, but their product remains the same in vacuum.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electromagnetic Waves
Electromagnetic waves consist of mutually perpendicular, oscillating electric and magnetic fields that also remain perpendicular to the direction of propagation. They travel through vacuum at the speed of light and include radio waves, microwaves, infrared, visible, ultraviolet, X-rays and gamma rays. Unlike mechanical waves, they do not require a material medium.
Practise Alternating Current
592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electromagnetic Waves questions
Modern system of navigation satellites called ___________?
The wave that has the highest frequency and penetrating power is
Ultraviolet radiation is more damaging to skin than visible light because ultraviolet photons
UV radiation can be produced by______________?
X-rays are similar in nature to_______________?
X-rays are electromagnetic waves like________________?