Advertisements
Advertisements
Question
Choose the correct option.
How does the frequency of a beam of ultraviolet light change when it travels from air into glass?
Options
depends on the values of μ and ε
increases
decreases
remains same
Advertisements
Solution
remains same
APPEARS IN
RELATED QUESTIONS
How are infrared waves produced?
To which part of electromagnetic spectrum does a wave of frequency 3 × 1013 Hz belong?
A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength?
State Moseley's law
Name two electromagnetic waves of frequency smaller than that of violet light. State one use of each.
Which part of electromagnetic spectrum is used in radar systems?
Can X-rays be used for photoelectric effect?
The Kα X-rays of aluminium (Z = 13) and zinc (Z = 30) have wavelengths 887 pm and 146 pm respectively. Use Moseley's law √v = a(Z − b) to find the wavelengths of the Kα X-ray of iron (Z = 26).
(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 Ultraviolet rays
Name two sources of ultraviolet radiation.
Choose the correct option.
The EM wave emitted by the Sun and responsible for heating the Earth’s atmosphere due to greenhouse effect is
Answer briefly.
Why light waves travel in a vacuum whereas sound waves cannot?
Answer briefly.
Give two uses of radio waves.
Answer briefly.
Name the most harmful radiation entering the Earth's atmosphere from outer space.
Calculate the wavelength of a microwave of a frequency of 8.0 GHz.
Which of the following is a tool used for separating the different color wavelengths from each other?
Following QN ∴ 14, the radiation force on the roof will be
Ozone layer above the earth's atmosphere will
A radio can tune to any station in the 7.5 mHz to 12 MHz band. What is corresponding wave length band.
SONAR emits which of the following waves?
One requires 11eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in ______.
Why does microwave oven heats up a food item containing water molecules most efficiently?
Electromagnetic waves with wavelength
- λ1 is used in satellite communication.
- λ2 is used to kill germs in water purifies.
- λ3 is used to detect leakage of oil in underground pipelines.
- λ4 is used to improve visibility in runways during fog and mist conditions.
- Identify and name the part of electromagnetic spectrum to which these radiations belong.
- Arrange these wavelengths in ascending order of their magnitude.
- Write one more application of each.
Write two uses of the following radiation.
Gamma rays
Choose the correct option related to wavelengths (λ) of different parts of the electromagnetic spectrum.
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.
What is the wavelength range of electromagnetic radiation used in radio broadcast?
