Focus of a Convex Lens
Trending Questions
In a convex lens, ray parallel to the principal axis after refraction passes through which of the following?
Cannot be determined
centre of curvature
focus
optical centre
A light ray passing through the optic centre of a convex lens will pass through ___ after refraction.
principal focus
centre of curvature
It will not deviate from its path
a point between optic centre and focus
Question 17
Which of the following ray diagram is correct for the ray of light incident on a lens as shown in figure 1?
(a) Fig. A.
(b) Fig. B.
(c) Fig. C.
(d) Fig. D.
Which of the following is true about lenses?
convex mirror has negative focal lengths concave lens have positive focal length
convex mirror has positive focal length and concave lens have positive focal length
convex mirror has positive focal length and concave lens have negative focal length
both convex mirror and convex lens have negative focal length.
- At optical centre
- Between Center of curvature and focus
- Between focus and optical centre
- At Focus
- Hypermetropia, 0.4 m
- Myopia, 0.4 m
- Myopia, −0.4 m
- Hypermetropia, −0.4 m
- Between Center of curvature and focus
- At Focus
- At optical centre
- Between focus and optical centre
If a ray passing through the focus gets refracted by a convex lens, where will it intersect the principal axis?
At focus on the other side.
At the pole of the lens.
At double the focal length on the other side.
Does not intersect at all.
- large and small
- small and large
- equal
- too small are too large
If F1 and F2 represents the foci of the lens, then at which point will the light rays meet?
F1
2F1
F2
2F2
- Between Center of curvature and focus
- At Focus
- Between focus and optical centre
- At optical centre
- Between Center of curvature and focus
- At Focus
- At optical centre
- Between focus and optical centre
In a convex lens, ray parallel to the principal axis after refraction passes through which of the following?
through centre of curvature
through optical centre
through focus
parallel to principal axis
Parallel rays of light entering a convex lens converge at:
Centre of curvature
Optical centre
Principal focus
Secondary focus