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प्रश्न
Choose the correct option.
The EM wave emitted by the Sun and responsible for heating the Earth’s atmosphere due to greenhouse effect is
पर्याय
Infra-red radiation
X-ray
Microwave
Visible light
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उत्तर
Infra-red radiation
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संबंधित प्रश्न
To which part of the electromagnetic spectrum does a wave of frequency 5 × 1019 Hz belong?
To which part of the electromagnetic spectrum does a wave of frequency 5 × 1011 Hz belong?
Give a reason for the following:
Long-distance radio broadcasts use short-wave bands. Why?
The small ozone layer on top of the stratosphere is crucial for human survival. Why?
What do you understand by the statement, "Electromagnetic waves transport momentum"?
A wave has a wavelength of 10-3 nm. Name the wave.
What do you understand by the invisible spectrum?
Can X-rays be polarised?
Why is exposure to X-rays injurious to health but not exposure to visible light, when both are electromagnetic waves?
An X-ray beam can be deflected
Cutoff wavelength of X-rays coming from a Coolidge tube depends on the
(a) target material
(b) accelerating voltage
(c) separation between the target and the filament
(d) temperature of the filament.
The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation,
(a) the intensity increases
(b) the minimum wavelength increases
(c) the intensity remains unchanged
(d) the minimum wavelength decreases.
X-ray incident on a material
(a) exerts a force on it
(b) transfers energy to it
(c) transfers momentum to it
(d) transfers impulse to it.
Suppose a monochromatic X-ray beam of wavelength 100 pm is sent through a Young's double slit and the interference pattern is observed on a photographic plate placed 40 cm away from the slit. What should be the separation between the slits so that the successive maxima on the screen are separated by a distance of 0.1 mm?
Name the scientist who discovered Visible light
Name the scientist who discovered radio waves
State two properties of infrared radiations which differ from visible light.
State three properties of infrared radiations similar to that of visible light.
Give one use of electromagnetic radiation in Microwaves.
Name the radiations used for the detection of fracture in bones.
Name the e.m. waves which are suitable for radar systems used in aircraft navigation. Write the range of frequency of these waves.
Light of wavelength `3500A` is incident on two metals A and B whose work functions are 3.2 eV and 1.9 eV respectively. Which metal will emit photoelectrons?
Find the photon energy in units of ev for electromagnetic wave if waves length 40 m. Given h = 6.63 × 10–34 J.
The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is ______.
Electromagnetic waves with wavelength
- λ1 is suitable for radar systems used in aircraft navigation.
- λ2 is used to kill germs in water purifiers.
- λ3 is used to improve visibility in runways during fog and mist conditions.
Identify and name the part of the electromagnetic spectrum to which these radiations belong. Also arrange these wavelengths in ascending order of their magnitude.
Write two uses of the following radiation.
X-rays
Which is the correct ascending order of wavelengths?
Identify the electromagnetic wave whose wavelength range is from about 10-3 m to about 10-1 m. Write one use of this.
Choose the correct option related to wavelengths (λ) of different parts of the electromagnetic spectrum.
