हिंदी

Answer briefly. Does an ordinary electric lamp emit EM waves?

Advertisements
Advertisements

प्रश्न

Answer briefly.

Does an ordinary electric lamp emit EM waves?

एक पंक्ति में उत्तर
Advertisements

उत्तर

Yes, an ordinary electric lamp emits EM waves.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 13: Electromagnetic Waves and Communication System - Exercises [पृष्ठ २४०]

APPEARS IN

बालभारती Physics [English] Standard 11 Maharashtra State Board
अध्याय 13 Electromagnetic Waves and Communication System
Exercises | Q 2. (vi) | पृष्ठ २४०

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

To which part of electromagnetic spectrum does a wave of frequency 3 × 1013 Hz belong?


To which part of the electromagnetic spectrum does a wave of frequency 5 × 1019 Hz belong?


The small ozone layer on top of the stratosphere is crucial for human survival. Why?


Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.


(a) Give a list of at least five radiations, in order of their increasing frequencies, which make up the complete electromagnetic spectrum.

(b) Which of the radiation mentioned by you in part (a) has the highest penetrating power.


What do you understand by the invisible spectrum? 


Give one use of microwaves.


Name the waves used for taking photographs in dark.


The wavelength of X-rays is 0.01 Å. Calculate its frequency. State the assumption made, if any.


Can X-rays be polarised?


The energy of a photon of a characteristic X-ray from a Coolidge tube comes from


One of the following wavelengths is absent and the rest are present in the X-rays coming from a Coolidge tube. Which one is the absent wavelength?


Find the cutoff wavelength for the continuous X-rays coming from an X-ray tube operating at 30 kV.

(Use Planck constant h = 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)


What is the cause of dispersion?

Two waves A and B have wavelength 0.01 Å and 9000 Å respectively.

Name the two waves. compare the speeds of these waves when they travel in vacuum.


Name any two electromagnetic waves which have a frequency higher than that of violet light. State one use of each.


Answer briefly.

Give two uses of radio waves.


Solve the numerical problem.

Calculate the frequency in MHz of a radio wave of wavelength 250 m. Remember that the speed of all EM waves in a vacuum is 3.0 × 108 m/s.


Solve the numerical problem.

Calculate the wavelength in nm of an X-ray wave of frequency 2.0 × 1018 Hz.


For television broadcasting, the frequency employed is normally


The frequency of x-rays, y-rays and ultraviolet rays are respectively a, b and c. Then:-


Following QN ∴ 14, the radiation force on the roof will be


Ozone layer above the earth's atmosphere will


Choose the correct option related to wavelengths (λ) of different parts of the electromagnetic spectrum.


Which part of the electromagnetic spectrum is known as the visible spectrum?


Which radiation has the longest wavelength and lowest frequency in the electromagnetic spectrum?


Why can a microwave oven heat food?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×