Related Questions

দুটি সুসঙ্গত উৎস থেকে λ দৈর্ঘ্যের দুটি তরঙ্গ সমদশায় বের হয় । একটি বিন্দুতে যেখানে তরঙ্গ দুটি মিলিত হয় সেখানে তাদের দশা পার্থক্য 90° । তরঙ্গ দুটির অতিক্রান্ত পথ পার্থক্য তখন কত ? ( Two coherent sources emit waves of wavelength λ which are in phase. which are in phase. The two waves meet at a point where they have a phase difference of 90°. Which of the following could be the traversed path difference between the waves?)
A 2λ
B λ
C λ/2
D λ/4
Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
A i only
B ii only
C both i & ii
D neither i nor ii
Sound waves are ------ waves.
A transverse
B Electromagnetic
C Longitudinal
D one of these
sounds waves are -- waves
A transverse
B Electromagnetic
C Longitudinal
D none of these
The higher the wind speed and the longer the fetch or distance of open water across which the wind blows and waves travel, the ____ waves and the ____ energy they process.
A larger, more
B larger, less
C smaller, more
D smaller, less
The ridges of the waves are where the jet stream of waves closes to the
A poles
B equator
C prime meridian
D None of the above
The troughs of the waves are where the jet stream of waves is closest to the
A poles
B equator
C Prime meridian
D None of the above
Which of the following statements is correct about sound waves and light waves?
A Both transverse waves
B Both longitudinal waves
C Sound waves are transverse waves and light waves are longitudinal waves
D Sound waves are longitudinal and light waves are transverse waves
Circular polarization
A Is useful in reducing depolarization effect on received wave
B Involves critical alignment of transmitting and receiving antenna
C Is useful in discrimination between reception of adjacent beams
D None of the above
In solid insulator materials having only one kind of atom, the types of polarization which exist are
A Electronic only
B Electronic and ionic
C Electronic, ionic and permanent
D Electronic and permanent

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