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प्रश्न
What happens when an electron collides with a positron?
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उत्तर
They annihilate each other, producing gamma ray photons.
संबंधित प्रश्न
Use the formula λm T= 0.29 cm K to obtain the characteristic temperature ranges for different parts of the electromagnetic spectrum. What do the numbers that you obtain tell you?
What is the range of the wavelength of the following electromagnetic waves?
(a) Micro waves .
Give one use of microwaves.
Give one use of ultraviolet radiation.
Name the waves of wavelength nearly 0.1 nm.
If the operating potential in an X-ray tube is increased by 1%, by what percentage does the cutoff wavelength decrease?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Choose the correct option.
How does the frequency of a beam of ultraviolet light change when it travels from air into glass?
Answer briefly.
Why light waves travel in a vacuum whereas sound waves cannot?
X-rays, gamma rays and microwaves travelling in a vacuum have ______.
The ozone layer absorbs
