What kind of image is created by a concave lens?

The head mirror used by E.N.T doctors is -

CD reflecting rainbow colours is due to a phenomenon called

The different colours in soap bubbles is due to

National Science Day

The phenomenon of scattering of light by the colloidal particles is known as

2021 അന്താരാഷ്ട്ര ബഹിരാകാശ വാരാഘോഷത്തിൻ്റെ വിഷയം എന്താണ് ?

The principal of three primary colours was proposed by

Father of long distance radio transmission

X rays were discovered by

Which among the following is having more wavelengths?

Which of the following is called heat radiation?

Which of the following electromagnetic waves is used to destroy cancer cells?

Which type of light waves/rays used in remote control and night vision camera ?

TV remote control uses

Which of the following electromagnetic waves has the highest frequency?

Light with longest wave length in visible spectrum is _____?

Which radiation has the highest penetrating power?

Which one among the following types of radiations has the smallest wave length?

Which of the following rays has maximum frequency?

Which one is correct?

Light wave is a good example of

What does LASER stand for?

A sound wave is an example of a _____ wave.

In a longitudinal wave, the motion of the particles is _____ the wave's direction of propagation.

In a transverse wave, the motion of the particles is _____ the wave's direction of propagation.

Which type of mirror is used in rear view mirrors of vehicles?

What type of energy transformation takes place in dynamo ?

Microphone is used to convert