The focal length of the objective of a compound microscope is f0 and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument,
(a) L < u
(b) L > u
(c) f0 < L < 2f0
(d) L > 2f0
Choose the correct option:
1. (a) and (b)
2. (b) and (d)
3. (b) and (c)
4. (c) and (d)
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306666
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306666
The angular dispersion produced by a prism:
1. | increases if the average refractive index increases |
2. | increases if the average refractive index decreases |
3. | remains constant whether the average refractive index increases or decreases |
4. | has no relation with the average refractive index |
If a glass prism is dipped in water, its dispersive power
1. increases
2. decreases
3. does not change
4. may increase or decrease depending on whether the angle of the prism is less than or greater than 60°
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306668
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306668
A prism can produce a minimum deviation \(\delta\) in a light beam. If three such prisms are combined, the minimum deviation that can be produced in this beam is
1. 0
2. \(\delta\)
3. 2\(\delta\)
4. 3\(\delta\)
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306669
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306669
Consider the following two statements:
(A) Line spectra contain information about atoms.
(B) Band spectra contain information about molecules.
1. Both A and B are wrong
2. A is correct but B is wrong
3. B is correct but A is wrong
4. Both A and B are correct
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306671
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306671
The focal length of a converging lens are fv and fr for violet and red light respectively.
1. fv > fr
2. fv = fr
3. fv < fr
4. Any of the three is possible depending on the value of the average refractive index \(\mu\)
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306673
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306673
A narrow beam of white light goes through a slab having parallel faces.
(a) The light never splits in different colours
(b) The emergent beam is white
(c) The light inside the slab is split into different colours
(d) The light inside the slab is white
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (d)
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306674
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306674
By properly combining two prisms made of different materials, it is possible to
(a) have dispersion without average deviation
(b) have deviation without dispersion
(c) have both dispersion and average deviation
(d) have neither dispersion nor average deviation
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (a), (b) and (c)
3. (b), (c) and (d)
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306677
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306677
In producing a pure spectrum, the incident light is passed through a narrow slit placed in the focal plane of an achromatic lens because a narrow slit
1. produces less diffraction
2. increases intensity
3. allows only one colour at a time
4. allows a more parallel beam when it passes through the lens
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306681
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306681
Which of the following quantities related to a lens depend on the wavelength or wavelengths of the incident light?
(a) Power
(b) Focal length
(c) Chromatic aberration
(d) Radii of curvature
Choose the correct option:
1. (a), (b) and (c)
2. (b), (c) and (d)
3. (a) and (b)
4. All of the above
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306685
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 306685