मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now?

Advertisements
Advertisements

प्रश्न

If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now?

टीपा लिहा
Advertisements

उत्तर

In the absence of an atmosphere, there would be no greenhouse effect on the surface of the Earth. As a result, the temperature of the Earth would decrease rapidly, making it chilly and difficult for humans to survive.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Electromagnetic Waves - Exercise [पृष्ठ २८७]

APPEARS IN

एनसीईआरटी Physics Part I and II [English] Class 12
पाठ 8 Electromagnetic Waves
Exercise | Q 8.15 (e) | पृष्ठ २८७

व्हिडिओ ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्‍न

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


State Moseley's law


Name the rays or waves  of highest frequency .


Can X-rays be polarised?


Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,


The Kα and Kβ X-rays of molybdenum have wavelengths 0.71 A and 0.63 A respectively. Find the wavelength of Lα X-ray of molybdenum.

(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)


Name the scientist who discovered Infra-red waves


Give two properties of ultraviolet radiations which differ from the visible light.

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.


Gamma rays D C Visible light B A

The above table shows different parts of the electromagnetic spectrum.
(a)    Identify the parts of the spectrum marked as A, B, C and D.
(b)    Which of the radiations A or B has the higher frequency?
(c)    State two properties which are common to all parts of the electromagnetic spectrum.
(d)    Name one source of each of the radiation of electromagnetic spectrum.
(e)    Name one detector for each of the radiation.
(f)    Name one use of each of the radiation.


Name two sources of infrared radiation.


Name the radiations used for the detection of fracture in bones.


What is the wavelength of the wave whose frequency is 1012 Hz? Name the electromagnetic wave.


Answer briefly.

Name the most harmful radiation entering the Earth's atmosphere from outer space.


The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is ______.


Arrange the following electromagnetic radiation in the ascending order of their frequencies:

X-rays, microwaves, gamma rays, radio waves


Which one of the following electromagnetic radiation has the least wavelength?


Identify the electromagnetic radiation and write its wavelength range, which is used to kill germs in water purified. Name the two sources of these radiations.


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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×