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CBSE - XII Science - Physics - Electromagnetic Waves

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Asked by nitishkrnehu09 1st January 2018, 4:24 AM
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CBSE - XII Science - Physics - Electromagnetic Waves

WHAT IS THE RATIO OF UV RAYS AND INFRARED RAYS IN GLASS?
PLEASE GIVE ANSWER EARLIER

Asked by modi72879 25th December 2017, 8:46 AM
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CBSE - XII Science - Physics - Electromagnetic Waves

Arrange the following electromagnetic wave in the order of their increasing wavelength: (a) γ- rays (b) Microwaves (c) X-rays (d) Radio waves How are infra-red waves produced? What role dose infra-red radiation play in (i) maintain the Earth’s warmth and (ii) physical therapy? 

Asked by Topperlearning User 10th July 2015, 8:24 AM
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CBSE - XII Science - Physics - Electromagnetic Waves

What is/are the common factors between all kinds of electromagnetic radiations?

Asked by Topperlearning User 27th October 2014, 1:33 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

what is meant by transverse nature of electromagnetic waves?draw a diagram showing the propagation of an electromagnetic wave along  the x direction ,indicating clearly the directions of the oscillaing electric and magnetic fields associated with it?

Asked by lolepradnya 27th September 2014, 7:33 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Arrange the following electromagnetic radiations in ascending order of their frequencies: (i) Microwave (ii) Radio wave (iii) X-rays (iv) Gamma rays Write two uses of any one of these.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Name the part of the electromagnetic spectrum of wavelength 10-2m and mention its one application.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Which of the following, if any, can act as a source of electromagnetic waves. (i) A charge moving with a constant velocity (ii) A charge moving in a circular orbit. (iii) A charge at rest Give reason 

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Name the colours in the visible spectrum and their wavelengths in Armstrong.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Name which part of the electromagnetic spectrum is used for: a) Treating muscular strains b) To treatment of certain kinds of cancer c) Sterilizing Instruments

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Answer the following: a) Which part of the electromagnetic spectrum has largest penetrating power? b) Which part of the electromagnetic spectrum has highest frequency?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Find the ratio of the speeds of infra red rays and gamma rays in vacuum?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

State the uses of Infra Red Rays.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

What is visible spectrum?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

What is the wavelength of electromagnetic wave of frequency 4 X 109 Hz in free space? Also state its applications.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

What is electromagnetic spectrum?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

How are infrared waves produced? Why are these referred to as 'heat waves'? Write their one important use.

Asked by Topperlearning User 20th May 2014, 9:07 AM
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CBSE - XII Science - Physics - Electromagnetic Waves

Which of the following has the shortest wavelength ? Microwave, Ultraviolet rays, X-rays

Asked by Topperlearning User 20th May 2014, 9:01 AM
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CBSE - XII Science - Physics - Electromagnetic Waves

Is the ratio of frequencies of ultraviolet rays and infrared rays in glass more than, less than or equal to 1 ?

Asked by Topperlearning User 20th May 2014, 8:59 AM
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CBSE - XII Science - Physics - Electromagnetic Waves

The frequency values  and   for two spectral lines of the EM spectrum are found as 5 x 1020 Hz and 2.5 x 1011 Hz respectively. Find the ratio  of their wavelengths.

Asked by Topperlearning User 19th May 2014, 4:44 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Find the wavelength of electromagnetic waves of frequency 6 × 1012 Hz in free space. Give its two applications.

Asked by Topperlearning User 19th May 2014, 4:37 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Write the physical limit of visible range of electromagnetic spectrum in kHz.

Asked by Topperlearning User 19th May 2014, 4:34 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Identify the following electromagnetic radiations as per the frequencies given below : (a) 1020 Hz (b) 109 Hz (c)1011 Hz   Give one application of each.

Asked by Topperlearning User 21st March 2014, 3:38 PM
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CBSE - XII Science - Physics - Electromagnetic Waves

Identify the following electromagnetic radiation as per the wavelength given below. (a) 10-3 nm (b) 10-3 m (c)1 nm Write one application of each

Asked by Topperlearning User 21st March 2014, 3:35 PM
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