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
What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value?
A 0°
B 45°
C 90°
D 180°
If two sine waves of the same frequency have a phase difference of JT radians, then
A Both will reach their minimum values at the same instant
B Both will reach their maximum values at the same instant
C When one wave reaches its maxi¬mum value, the other will reach its minimum value
D None of the above
At a dinner party every two guests shared a bowl of rice between them, every three guests shared a bowl of vegetable between them and every four shared a bowl of meat between them. There were altogether 65 bowls. How many guests were present at the party?
A 60
B 65
C 90
D 100
Ten books are arranged in a row following a certain sequence. Among them 3 are History , 3 are Economics, 2 are Maths and 2 are English. From the left, there is an English book between a History and Maths book, a history book between a Maths and an English book, an Economics book between an English and a Maths Book. a Maths book between two Economics books and two Economics two Economics book between a Maths and a History book. Book of which subject is at the sixth position from the left?
A English
B Economics
C History
D Mathematics
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
If one angle of a triangle is three times a second angle and the third is 20 degrees more than the second angle, the second angle, in degrees, is
A 32
B 36
C 4
D None of these
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

Next steps