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CBSE Notes 2011-2012 » XII-Physics

Electromagnetic Waves

Name the electromagnetic radiation to which the following wavelengths belong : (a) 10-2 m (b) 1 A [D...

Short answer question

Name the electromagnetic radiation to which
the following wavelengths belong :
(a) 10-2 m (b) 1 A [Delhi 2006C]

What is the name given to that part of electromagnetic spectrum which is used for taking photographs...

Short answer question

What is the name given to that part of
electromagnetic spectrum which is used for
taking photographs of earth under foggy
conditions from great heights ? [Delhi 2004]

What is the name given to that part of electromagnetic spectrum which is used in 'Radar' ? [Delhi 20...

Short answer question

What is the name given to that part of electromagnetic
spectrum which is used in 'Radar' ?
[Delhi 2004]

Microwaves are used in Radar'. Why ? [Delhi 2004]

Short answer question

Microwaves are used in Radar'. Why ?
[Delhi 2004]

Name the electromagnetic waves that have frequencies greater than those of ultra violet light but le...

Short answer question

Name the electromagnetic waves that have
frequencies greater than those of ultra violet
light but less than those of gamma rays.
[Delhi 2004C]

Name the scientist who first (i) predicted the existence of electromagnetic waves (ii) experimentall...

Short answer question

Name the scientist who first (i) predicted the
existence of electromagnetic waves
(ii) experimentally demonstrated the existence
of electromagnetic waves. [Delhi 2004C]

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