10th Class Physics Online MCQs Chapter No.3 Geometrical Optics

The rough surfaces of objects reflect the rays of light in many directions is called;

Sin i / Sin r = n = n2 /n1 is called;

Speed of light is greater ........

If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will

Lenses are used in optical devices;

Image formed on a camera is

No refraction occurs when the angle of incidence is;

When a ray of light enters from a denser medium to a rarer medium;

It is a transparent body (made of optical glass) with at least two polished plane faces inclined towards each other from which light is refracted;

The lens which causes incident parallel rays to converge at a point is;

The line passing through the two centres of curvatures of the lens is called;

ID = ?

Convex mirror produce images;

An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

The critical angle for a beam of light passing from water into air is 48.8 degrees. This means that all light rays with an angle of incidence greater than this angle will be

The angle of incidence that causes the refracted ray in the rarer medium to bend through 90° is called;

The angle between the normal and the reflected ray is called angle of;

The index of refraction depends on

Focal length of spherical mirror is;

?  = Speed of light in vacuum / Speed of light in medium

SI unit of power of lens is;

The speed of light in air is approximately;

Which of the following quantities is not changed during refraction of light?

Which type of image is formed by a concave lens on a screen?

The speed of light in water is approximately;

Which type of image is produced by the converging lens of human eye if it views a distance object?

An object is placed at the centre of curvature of a concave mirror. The image produced by the mirror is located

Regular reflection is reflection the;

Optical centre is represented by;

Angle of incidence is represented by;

The relationship between object distance p, image distance q from the mirror and focal length of the mirror is called;

Planck suggested that light consists of small packets of energy called;

In lens number of curved surfaces at least;

According to law of refraction;

Lens thick at the centre but thin at the edges is;

The incident ray, the normal, and the reflected ray at the point of incidence all lie in the;

According to law of reflection;

Mirror formula is;

The bending of light as it passes from one transparent medium into another is;

The angle between incident ray and normal N is;

For a concave lens, the parallel rays appear to come from a point behind the lens is called;

It has positive focal length;

The distance between the optical centre and the principal focus is;

A converging mirror a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?