Spherical Mirrors and Lenses in Science 158 Rationalised 2023-24

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Which path will a ray parallel to the principal axis follow after reflection in a concave mirror?

Appear to diverge from the principal focus

Pass through the principal focus (correct)

Emerge parallel to the principal axis

Reflect back along the same path

What happens to a ray directed towards the principal focus of a convex mirror after reflection?

Diverges from the principal focus (correct)

Emerges parallel to the principal axis

Reflects back along the same path

Passes through the principal focus

What path will a ray passing through the centre of curvature of a concave mirror follow after reflection?

Pass through the principal focus

Diverge from the principal focus

Emerge parallel to the principal axis

Reflect back along the same path (correct)

How are the incident and reflected rays oriented with respect to the principal axis in the case of oblique incidence towards the pole of a mirror?

Make equal angles with the principal axis Signup and view all the answers

What is the general behavior of light rays with regard to following the laws of reflection in all cases described?

They follow the laws of reflection Signup and view all the answers

Which incident ray orientation results in emerging rays that are parallel to the principal axis in the case of a convex mirror?

Ray directed towards the principal focus Signup and view all the answers

What is common among all types of reflecting surfaces?

They obey the laws of reflection Signup and view all the answers

What is the relationship between the focal length of a spherical mirror and its radius of curvature?

The focal length is equal to half the radius of curvature Signup and view all the answers

What happens to a light ray when it travels obliquely from a denser medium to a rarer medium?

It bends away from the normal Signup and view all the answers

What is the speed of light in vacuum?

3×108 m s-1 Signup and view all the answers

What is the refractive index of a transparent medium?

The ratio of the speed of light in vacuum to that in the medium Signup and view all the answers

What is the direction of the emergent ray in a rectangular glass slab?

Parallel to the direction of the incident ray Signup and view all the answers

What is the primary condition for the laws of reflection to be applicable?

The incident ray, the normal to the mirror, and the reflected ray lie in the same plane Signup and view all the answers

What is the relationship between the angle of incidence and the angle of reflection?

The angle of incidence is equal to the angle of reflection Signup and view all the answers

What is the orientation of the incident ray, the normal to the mirror, and the reflected ray?

They all lie in the same plane Signup and view all the answers

What is the shape of the surface required for the laws of reflection to be applicable?

Any shape is acceptable Signup and view all the answers

What is the purpose of a highly polished surface in relation to reflection?

To reflect most of the light falling on it Signup and view all the answers

What is the relevance of the laws of reflection in understanding optical phenomena in nature?

They are essential in understanding some of the optical phenomena in nature Signup and view all the answers