If the wavelength of a light is 3 x 10^-7, then what is it its frequency?
Correct answer: C. 1 x 10^15 Hz
- A. 1 x 10^13 Hz
- B. 1 x 10^14 Hz
- C. 1 x 10^15 Hz
- D. 1 x 10^16 Hz
Explanation
By using c = f λ f = c/λ = 3 ×10^8/3 × 10^-7 f = 1 × 10^8+7 f = 1 × 10^15 Hz Hence, option c is correct.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
Practise Optics
665 free Optics 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 11 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 Optics questions
When a light ray passes through a small opening, the longer wave length of the red colour as compared to shorter wavelength of violet colour will
At points where the displacements of two waves cancel each other's effect. the path difference is an odd integral multiple of half the wavelength. This effect is known as:
The ratio of the angles subtended by the image as seen through the optical device to that subtended by the object at the unaided eye is known as:
The energy of light is determined by its:
Which is the correct 'ascending order' in which the following photons are arranged according to their energy?
The frequency of a light beam "A" is half of that of light beam "B". The ratio EA/Ea of photons energies is:(hint: where EA & Es are the respective energies of light Beam "A" & "B")