Table of Contents
- 1 What happens if a light ray passes through optic center?
- 2 What is the deviation of a light ray passing through optical Centre of a lens?
- 3 When a ray of light passes through the optical center of a spherical lens which of the following sentences is true?
- 4 Which two rays will not deviate?
- 5 What are the three principle rays?
- 6 What are the three types of rays that pass through a lens?
- 7 What is the point inside the lens through which light passes Undeviated?
What happens if a light ray passes through optic center?
A ray of light passing through the optical centre of a spherical lens will emerge without any deviation.
What is the deviation of a light ray passing through optical Centre of a lens?
The portion of a lens near the optical centre is like a very thin slab of glass. 2. Hence, the rays of light passing through the optical centre of a lens do not deviate.
When a ray of light passes through the optical center of a spherical lens which of the following sentences is true?
When a ray of light passes through the optical center, it is perpendicular to the curved surface, hence angle of incidence is 0, hence angle of refraction is also 0.
Do all rays pass through the focal point?
Any incident ray traveling parallel to the principal axis on the way to the mirror will pass through the focal point upon reflection. Any incident ray passing through the focal point on the way to the mirror will travel parallel to the principal axis upon reflection.
Why does light ray passing through C goes Undeviated?
Any light ray incident on the optical centre can be viewed as incident on the centre of a circle of which the lens is a part. Hence, we can say that this light ray is incident normally on the lens. Hence, a light ray incident on optical centre passes undeviated through it after refraction.
Which two rays will not deviate?
Answer : A ray of Light does not deviate at interface of two media in two cases. When incidence ray strikes normally at the point of incidence.
What are the three principle rays?
There are three principal rays. The first principal ray occurs when the light comes in parallel to the principle axis, it goes out through the focus. The second principal ray occurs when light comes in through the focus, then it comes out parallel to the principle axis.
What are the three types of rays that pass through a lens?
Ray Diagrams for Lenses
- A ray from the top of the object proceeding parallel to the centerline perpendicular to the lens. Beyond the lens, it will pass through the principal focal point.
- A ray through the center of the lens, which will be undeflected.
- A ray through the principal focal point on the near side of the lens.
Why does the middle light ray not bend?
Because the lens is symmetrical about the horizontal line the angle it emerges from the lens, θ, is equal to the angle it hits the lens. So the direction of the ray doesn’t change, but it is displaced slightly.
What will be the angle of incidence for a ray of light passing through the centre of the curvature of a concave mirror?
0 degree
Explanation: As the ray of light passes through centre of curvature of a concave mirror it strikes the mirror along the normal (i.e. it incidences on to the mirror at 90 degree and 0 degree with normal). Hence the incident ray coincides with the normal. Therefore angle of incidence is 0 degree.
What is the point inside the lens through which light passes Undeviated?
Optical centre is the point on the principal axis of a lens through which light passes undeviated.