Question : An electron microscope gives higher magnifications than an optical microscope because:

Option 1: The velocity of electrons is smaller than that of light.

Option 2: The wavelength of electrons is smaller as compared to the wavelength of visible light.

Option 3: The electrons have more energy than the light particulars.

Option 4: The electron microscope uses more powerful lenses.

Question : The mercury and sodium street lamps light up because of:

Option 1: Atomic emission

Option 2: Atomic absorption

Option 3: Electron emission

Option 4: Electron absorption

Question : Electrons in the highest energy level of an atom are called ________.

Option 1: Valence protons

Option 2: Orbital protons

Option 3: Valence electrons

Option 4: Orbital electrons

Question : What type of energy conversion takes place in a battery?

Option 1: Chemical energy into light energy

Option 2: Chemical energy into electrical energy

Option 3: Mechanical energy into chemical energy

Option 4: Chemical energy into sound energy

Question : The purpose of an optical filter is to___________.

Option 1: reflect lights of different colours

Option 2: dispense light into component colours

Option 3: refract the light of different colours

Option 4: transmit or absorb light of different colours