Light reaches the earth form sun in nearly____________________?
Correct answer: D. 8 minutes 30 seconds
- A. 15 minutes
- B. 10 minutes
- C. 8 minutes
- D. 8 minutes 30 seconds
Explanation
Using t = distance/speed, t = 1.496 x 10^11 m / 3.00 x 10^8 m/s = 498.7 s = 8 min 18.7 s, approximately 8 min 20 s. Of the given choices, 8 min 30 s is closer than 8 min, so d is the best answer. Students may choose c because many texts round the value loosely to 8 minutes.
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
The velocity of light was determined accurately by_______________?
Diffraction effect is____________________?
A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to ____________________?
Which is not optically active ?
Crystals of a material can behave as_________________?
In the shadow of a ball the central portion appears bright that happens due to_________________?