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The direction of buoyant force is always

The buoyant force due to a liquid acts vertically upward.... View Article

Which of these is not a valid assumption of kinetic theory of matter?

A) The intermolecular force increases with decrease in intermolecular space between molecules. B) The temperature of the matter is dependent on... View Article

A point on the principle axis of a lens through which light passes undeviated is called

Optical centre is the point on the principal axis of a lens through which light passes undeviated.... View Article

A simple magnifying glass consists of:

A simple magnifying glass consists of convex lens of small focal length.... View Article

If the density of an object is greater than the density of liquid, the object will

Object sinks in a liquid if its density is greater than the density of liquid.... View Article

A prism splits a beam of white light into seven colours because different colours have different

Prism splits a beam of white light into seven colours because different colours have different speeds due to different wavelengths.... View Article

Pencil immersed partly in water appears to be bent due to

The above effect is due to bending of light from its original path when it travels from one medium to another.... View Article

The seven coloured lights of the spectrum can be recombined when two prisms are placed in

Re-combination of seven colours is done with the help of two inverted prisms.... View Article

If the refractive index of two media are equal, then

If the refractive indices of two media are equal, then light ray is not refracted and the interface between two media is not visible.... View Article

The splitting of white light in to its component colours is called

The splitting of white light in to its component colours is called dispersion.... View Article

Who discovered that the clouds are electrically charged?

Benjamin Franklin discovered that the clouds are electrically charged. Around June 1752, Franklin conducted his famous kite experiment. By... View Article

A white light is a mixture of

A white light is a mixture of seven colours, Red, Orange, Yellow, Green, Blue, Indigo, and Violet.... View Article

What is the electrical discharge from clouds to building or a tree is called?

Answer: The electrical discharge from clouds to building or a tree is called a lightning streak. Lightning is caused due to the imbalances... View Article

At the time of rainbow, the raindrops in atmosphere acts like

At the time of rainbow, the raindrops in the atmosphere acts like many small prisms.... View Article

Fill in the Blank: When charges do not flow, the electricity is called _____.

Answer: When charges do not flow, the electricity is called static electricity. When charges do not flow, the electricity is called static... View Article

A rainbow is produced by the

A rainbow is produced by the dispersion of sunlight by the raindrops in the atmosphere. Rainbow is formed when the light rays travel through the... View Article

Valence electrons are:

Electrons present in the outermost orbit are known as valence electrons.... View Article

Light changes its path as the medium changes during the transit. Why?

Light changes it path as the medium changes during the transit because speed of light is dependent on the media through which it is passing. As... View Article

After refraction through a rectangular glass slab the emergent ray is

The extent of bending at opposite parallel faces is equal and opposite. Thus, emergent ray is parallel to incident ray.... View Article

A prism is said to be in minimum deviation when

When the angle of incidence is equal to the angle of emergence then the prism is said to be in minimum deviation.... View Article

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