Science 1 Marks Question

An erect and enlarged image of an object is formed only by the concave mirror or convex lens when it is placed very close to the object.

Yes, white light splits into seven colours when it passes through a prism. So, we can say that white light consist of seven colours.

Seven

Convex mirror always forms an erect and diminished image of an object.

The plane mirror always forms an erect and same size image as of object size. The properties and characteristics of the mirror does not depend on the size of mirror.

Yes, when a ray of light is incident on the mirror surface, then the mirror changes the direction of light.

When light falls on a polished or shiny surface like mirror, then it reflects and change the path of light.

The way to change the direction or path of light is to let it fall on a shiny surface or mirror.

Light always travels in a straight path. That's why, he does not able to see the candle flame through a bent pipe.

In first case light rays are converging towards a point, so the lens A will be convex and in case of lens B, light rays diverge or spread out. So, the lens will be concave lens.

By rotating Newton's colour disc, we can demonstrate that when seven colours are mixed together, then a white colour is formed.

If one half of a convex lens is covered with a black paper, then also, the convex lens will produce the complete image of the object.

Convex lens is a lens which can converge the sun's rays to a point and burn a hole in the piece of paper.

After the actual intersection of rays, the image obtained on the screen is always real image.

Reflection of light is the phenomenon which is involved in the formation of image of an object by a concave mirror.

For a single incident ray, there will be only one reflected ray that can be obtained in respect of a plane mirror.

When a light ray after getting reflected by an object falls on our eyes, it allows us to see things around us.

Light energy is the form of energy which produces the sensation of vision.

A concave lens always forms a virtual image.

A concave mirror can form a real image of an object.

An image that cannot be obtained on a screen is called virtual image.
In case of plane mirror, virtual image is formed.

A rainbow is formed due to the refraction, dispersion, and reflection of sunlight in water droplets present in the atmosphere.

True
A concave lens is called a diverging lens because it spreads out (diverges) parallel rays of light passing through it.

A convex lens is a converging lens, so it bends (refracts) parallel rays of sunlight and makes them meet at a single point called the focus.

The shopkeeper should use a concave mirror.
A concave mirror can give a magnified and wider view of the shop when the object is within its focal length, helping the shopkeeper to see more area.