Electromagnetic Waves - Online Test
Q1. Use the formula T = 0.29 cmK to obtain the characteristic temperature range for m
Answer : Option B
Explaination / Solution:
No Explaination.
Q2. Use the formula T = 0.29 cmK to obtain the characteristic temperature range for m
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. State the part of the electromagnetic spectrum to which 21 cm (wavelength emitted by atomic hydrogen in interstellar space).belongs
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. State the part of the electromagnetic spectrum to which 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift)..Belongs
Answer : Option B
Explaination / Solution:
No Explaination.
Q5. Part of the electromagnetic spectrum to which 2.7 K [temperature associated with the isotropic radiation filling all space-thought to be a relic of the ‘big-bang’ origin of the Universe] belongs is
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. Part of the electromagnetic spectrum to which 5890Ao - 5896Ao [double lines of sodium] belongs is
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. Part of the electromagnetic spectrum to which 14.4 keV [energy of a particular transition in nucleus associated with a famous high resolution spectroscopic method (Mossbauer spectroscopy)] belongs is
Answer : Option A
Explaination / Solution:
No Explaination.
Q8. Long distance radio broadcasts use short-wave bands because
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. It is necessary to use satellites for long distance TV transmission because
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. Optical and radio telescopes are built on the ground, but X-ray Astronomy is possible only from satellites orbiting the earth because
Answer : Option D
Explaination / Solution:
No Explaination.
