Question

Which of the following has maximum wavelength?
A. \[\gamma \]-rays
B. X-rays
C. UV-rays
D. visible rays

Answer 1

Hint:The electromagnetic spectrum of waves contains different types of waves according to their frequency the property of each of them is different. At the end of the spectrum it contains wave with lowest frequency or highest wavelength

Complete answer:
We know energy is carried to the earth from the sun by the waves known as electromagnetic waves. This type of waves includes the familiar visible, ultraviolet and infrared waves.Scottish physicist James Clerk Maxwell who first discovered that electric and magnetic fields fluctuating together can form a propagating 'electromagnetic wave'.

All the electromagnetic waves that exist move through vacuum at the same speed, and the symbol velocity of it is denoted by ‘C’. The electromagnetic (EM) spectrum is the combination of all types of EM radiation that exist. Radiation is nothing but a wave that is travelling with some energy that travels -the visible light that is produced from a light in our house and the radio waves that emits from the radio station are the two types of electromagnetic radiation.

The several other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, ultraviolet light X-rays and gamma rays. The different electromagnetic waves that can be arranged in the increasing order of their wavelengths as- Gamma rays < X-rays < Ultraviolet light
Hence, option D is the correct answer.

Note:The wavelength of a can change. The wavelength of a wave depends on the medium in which it is travelling in. But the frequency of any electromagnetic wave does not change or it is independent of the medium. The frequency of a wave is the property of its own.