Consider the following statements:
Assertion (A ): X-rays do not affect photo graphic plate
Reason(R ): Wavelengths of x-rays are in betweenn 1 A to 100 A
Answer : C. A is false, but R is true
when there is depletion of ozone in the stratosphere the wavelength of radiation striking the earth's surface will be
Answer : B. 10-7 m
which one of the following layers of the atmosphere is responsible for the reflection of radio waves?
Answer : D. Ionosphere
Which of the following waves/ rays are produced by nuclear changes in the atom?
Answer : D. gamma rays
The splitting of different colours in a prism is called
Answer : D. Dispersion
Four electro magnetic waves of different wave lengths are given. X-rays,Microwaves,Ultra Violent,Infrared. Their correct arrangement in the descending order of wave length is
Answer : B. Microwaves,Infrared,Ultraviolent and X-rays