What should the distance of an object from a convex lens of focal length f=10 cm to produce an erect image twice as large as the object?
Correct answer: D. 5 cm from the lens
- A. 20 cm from the lens
- B. 15 cm from the lens
- C. 10 cm from the lens
- D. 5 cm from the lens
Explanation
The explanation is given below:1/f= 1/p - 1/2p1/10 = 2-1/ 2p1/10 = 1/2p 2p =10 p= 5
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
Bragg's Law for measurement of wavelength 𝝀 of i-rays, using crystal lattice planes having distance d between each other, for constructive interference for integral multiple of i is:
The polarization of light by tourmaline crystals is due to the _effect.
Monochromatic light means the light having:
In double slit experiment, the fringe spacing of the diffracted rays increases when:
Light, emitted by a single source, passes through 2 narrow slits 1.00 mm apart. The interference pattern is observed on a screen 200 cm away and the separation between the centers of adjacent bright fringes is 2.00 mm. What would be the wavelength of the light?(u= micro)
In Young's double-slit experiment, fringes are very close to each other. How can we increase the distance between fringes?