HARD
12th Telangana Board
IMPORTANT
Earn 100
Write four main characteristics of electromagnetic waves.
Important Questions on Electromagnetic Waves
MEDIUM
12th Telangana Board
IMPORTANT
Use the formula to obtain the characteristic temperature ranges for different parts of the electromagnetic spectrum. What do the numbers that you obtain tell you?
MEDIUM
12th Telangana Board
IMPORTANT
Given here is a famous number associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which it belongs, (wavelength emitted by atomic hydrogen in interstellar space).
MEDIUM
12th Telangana Board
IMPORTANT
Given here is a famous number associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which it belongs, (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift).
MEDIUM
12th Telangana Board
IMPORTANT
Given here is a famous number associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which it belongs, [temperature associated with the isotropic radiation filling all space-thought to be a relic of the ‘big-bang’ origin of the universe].
MEDIUM
12th Telangana Board
IMPORTANT
Given here are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs, [double lines of sodium].
MEDIUM
12th Telangana Board
IMPORTANT
Given here is some famous number associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which it belongs, [energy of a particular transition in nucleus associated with a famous high-resolution spectroscopic method (Mossbauer spectroscopy)].
EASY
12th Telangana Board
IMPORTANT
Answer the following question: Long distance radio broadcasts use short - wave bands. Why?
MEDIUM
12th Telangana Board
IMPORTANT
Optical and radio telescopes are built on the ground, but X-ray astronomy is possible only from satellites orbiting the earth. Why?
