English

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.

Advertisements
Advertisements

Question

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.

Options

  • 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

Solution

A is true but R is false.

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

shaalaa.com
  Is there an error in this question or solution?
2023-2024 (March) Official

RELATED QUESTIONS

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


Give one use of microwaves.


Name three properties of ultraviolet radiations which are similar to visible light.


Name of physical quantity which remains same for microwaves of wavelength 1 mm and UV radiations of 1600 Å in vacuum.


The figure shows the intensity-wavelength relations of X-rays coming from two different Coolidge tubes. The solid curve represents the relation for the tube A in which the potential difference between the target and the filament is VA and the atomic number of the target material is ZA. These quantities are VB and ZB for the other tube. Then,


The energy of a silver atom with a vacancy in K shell is 25.31 keV, in L shell is 3.56 keV and in M shell is 0.530 keV higher than the energy of the atom with no vacancy. Find the frequency of Kα, Kβ and Lα X-rays of silver.

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


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.


To which regions of the electromagnetic spectrum do the following wavelengths belong: 
(a) 250 nm 
(b) 1500 nm 


Name two sources of infrared radiation.


An electron beam is accelerated by a potential difference V to hit a metallic target to produce X-rays. It produces continuous as well as characteristic X-rays. If λmin is the smallest possible wavelength of X-ray in the spectrum, the variation of log λmin with log V is correctly represented in:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×