PHYSICS [1 Mark Question Answer]

Convex mirrors are used as a rearview mirror in automobiles as it provides a wider view of the following traffic.

Concave mirrors are used in reflecting microscope, in shaving and makeup glasses, and an ophthalmoscope.

A convex mirror has a wider field of view.

The principal axis is the straight line passing through the pole and the centre of curvature.

Aperture is the distance between the extreme points on the periphery of the mirror.

Centre of curvature is the centre of the imaginary sphere to which the mirror belongs.

Pole is the centre of the reflecting surface, in this case, a spherical mirror.

A focal point is a principal focus of the mirror where a parallel beam of light meets(or appears to meet) after reflection from the mirror.

Focal length = 1/2 of radius of curvature
= 1/2 X 30 = 15cm.

When we look into a plane mirror, the image of our face is virtual because the image cannot be obtained on a screen.

The mirror having -20 cm as its focal length is a concave mirror because the focal length is taken negatively only in case of a concave mirror.

What is the nature of a mirror having a focal length of +15 cm?

The top mirror is a convex mirror, the middle mirror is a concave mirror and the bottom mirror is a plane mirror.

A spherical mirror is a part of a hollow glass sphere silvered on one side.

SI unit of the focal length is meter.

The object should be placed between F and P to obtain its magnified and erect image.

The focal length of the plane mirror is infinity.

A concave mirror can produce a real and diminished image of the object.

The relationship between the focal length, f, and radius of curvature, r is
f = 1/2 x r.

A convex mirror is used in vehicles to see the traffic following it. 

Two non -luminous bodies are the moon, chair.

The Sun and the stars are the two luminous bodies. 

A smooth, highly polished plane surface is called a plane mirror. 

Yes, light is a form of energy that produces the sensation of vision in our eyes. 

Any smooth, highly polished reflecting surface is called a mirror. 

The point at which the light is incident on the reflecting surface is called the point of incidence. 

The principle employed in a periscope is successive reflections from two plane mirrors. 

The formation of the image is the phenomenon based on laws of reflection. 

Lateral inversion is the reversal of the image experienced in a plane mirror. The image is of the same size and equidistant from the object but the left and right sides are transposed. 

Rectilinear propagation of light is that the light travels along a straight line. 

A smooth and polished flat surface is the cause of the regular surface. 

When rays of light fall on a surface, they are turned back into the same medium in accordance with some definite laws. This process is known as reflection. 

Light may be defined as the radiant energy which produces in us the sensation of sight. Light itself is invisible but makes other objects visible.

Waxed paper is the translucent medium among the given substances.

No, no metal is transparent by nature. 

No, glass is a transparent medium.

Rectilinear propagation of light is that the light travels along a straight line.

The substance through which light is made to pass is called medium. 

A parallel beam of light

Divergent beam of light

Divergent beam of light

A ray of light

The focal length of the plane mirror is infinity. 

The mirror having +20 cm as its focal length is a convex mirror because the focal length is taken positive only in case of a convex mirror. 

The distance of the principal focus from the pole of the mirror is called the focal length of the mirror. 

Only a concave mirror can produce a real and diminished image of an object.

We will use a convex mirror to see an enlarged image of our face. 

In the case of a concave mirror if the object is placed at a Focal point then ray emerging from it after reflecting from the mirror would be parallel to the principal axis.