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.
उत्तर
A is true but R is false.
Explanation: Because UV radiation has shorter wavelengths than microwave radiation, it scatters more.
APPEARS IN
संबंधित प्रश्न
To which part of electromagnetic spectrum does a wave of frequency 3 × 1013 Hz belong?
Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,
The stopping potential in a photoelectric experiment is linearly related to the inverse of the wavelength (1/λ) of the light falling on the cathode. The potential difference applied across an X-ray tube is linearly related to the inverse of the cutoff wavelength (1/λ) of the X-ray emitted. Show that the slopes of the lines in the two cases are equal and find its value.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Continuous X-rays are made to strike a tissue paper soaked with polluted water. The incoming X-rays excite the atoms of the sample by knocking out the electrons from the inner shells. Characteristic X-rays are analysed and the intensity is plotted against the wavelength. Assuming that only Kα intensities are detected, list the elements present in the sample from the plot. Use Moseley's equation v − (25 × 1014Hz)(Z − 1)2.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
State two properties of infrared radiations which differ from visible light.
Choose the correct option.
Earth’s atmosphere is richest in
What are the ultraviolet rays?
What is time period of the light for which the eye is most sensitive?
SONAR emits which of the following waves?
The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is ______.