मराठी

Assertion (A): Ultraviolet radiations is scattered more as compared to the microwave radiations. Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of microwave radiation. - Physics

Advertisements
Advertisements

प्रश्न

Assertion (A): Ultraviolet radiations is scattered more as compared to the microwave radiations.

Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of microwave radiation.

पर्याय

  • Both A and Rare true.

  • A is true but R is false.

  • A is false but R is true.

  • Both A and Rare false.

MCQ
Advertisements

उत्तर

A is true but R is false.

Explanation:  Because UV radiation has shorter wavelengths than microwave radiation, it scatters more.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2023-2024 (March) Official

संबंधित प्रश्‍न

An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm Calculate the velocity of the wave.


If the current in the circuit for heating the filament is increased, the cutoff wavelength


Iron emits Kα X-ray of energy 6.4 keV. Calculate the times taken by an iron Kα photon to cross through a distance of 3 km.

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


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 radiation of the electromagnetic spectrum which is used for the following:

Radar and Give the frequency range.


State three properties of ultra-violet radiation similar to visible light.


Answer briefly.

Can we produce a pure electric or magnetic wave in space? Why?


Answer briefly.

Why light waves travel in a vacuum whereas sound waves cannot?


The fundamental frequency of an open organ pipe is 300 Hz. The first overtone of this pipe has same frequency as first overtone of a closed organ pipe. If speed of sound is 330 m/s, then the length of closed organ pipe is:


Given below in the left column are different modes of communication using the kinds of waves given in the right column. 

A.  Optical Fibre
Communication
P. Ultrasound
B. Radar Q. Infrared Light
C. Sonar R. Microwaves
D. Mobile Phones  S. Radio Waves

From the options given below, find the most appropriate match between entries in the left and the right column.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×