Cutting of Thin Lenses
Trending Questions
Q. The given lens is broken into four parts rearranged as shown. If the initial focal length is f, then after rearrangement the equivalent focal length is
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/613950/original_Q09.PNG)
- f
- f2
- f4
- 4f
Q.
A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was 4D, the power of a divided lens will be
2D
3D
4D
5D
Q. A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was 4 D, the power of a divided lens will be
(a) 2 D
(b) 3 D
(c) 4 D
(d) 5 D.
(a) 2 D
(b) 3 D
(c) 4 D
(d) 5 D.
Q. An equal convex lens of focal length f was cut into two equal parts along a line perpendicular to the principle axis. The focal length of each half is
- f2
- f
- 2f
- 3f2
Q. Parallel beam of light is incident on the system of two convex lenses of focal lengths f1=20 cm and f2=10 cm. What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/940987/original_Q17.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/940987/original_Q17.png)
- 60 cm
- 30 cm
- 90 cm
- 40 cm
Q. A point object O is placed at a distance of 0.3 m from a convex lens (focal length 0.2 m) cut into two halves each of which is displaced by 0.0005 m as shown in the figure.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/613939/original_Q07.PNG)
If this arrangement will generate more than one image, then what will be the total number of images?
If this arrangement will generate more than one image, then what will be the total number of images?
- 2
- 4
- 6
- 5
Q.
A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens was 4D, the power of a cut-lens will be
2D
3D
4D
5D
Q. At what distance eye 'E' will observe the fourth image (after four refractions from plane surfaces) of object 'O' from itself?
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1249084/original_original_q10.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1249084/original_original_q10.png)