tiep tuc nha
Phat bieu nao sau day la sai khi noi ve dao dong cuong buc:
A.La dao dong chiu tac dung cua ngoai luc cuong buc tuan hoan theo thoi gian
B.tan so cua dao dong cuong buc bang tan so cua ngoai luc
C.Bien do cua dao dong cuong buc chi phu thuoc vao bien do cua ngoai luc cuong buc
D.bien do cua dao dong cuong buc khong thay doi
2 Dao dong cuong buc va dao dong duy tri co diem nao khong chung nhau
A.chiu tac dung cua ngoai luc tuan hoan
B.co bien do khong doi
C.co tan so bang tan so rieng cua he
D.co co nang khong doi
3.Phat bieu nao sau day khong dung khi noi ve cong huong
A.la hien tuong bien do dao dong cuong buc tang khi tan so cua ngoai luc cuong buc bang tan so rieng cua he dao dong
B.su cong huong xay ra ro net khi luc ma sat cua moi truong la nho
D.khoi khong khi trong hop dan ghi ta co the cong huong voi nhieu tan so khac nhau cua song am
4.theo thuyet luong tu anh sang thi nang luong cua
A.1 photon bang nang luong nghi cua 1 electron
B.1 photon phu thuoc khoang cach tu photon do den nguon phat ra no
C.cac pho ton trong chm sang don sac bang nhau
D.1 photon ti le thuan voi buoc song tuong ung voi photon do
5.Phat bieu sai
A.tia hong ngoai co tan so nho hon tan so cua anh sang tim
B.tia hong ngoai co ban chat song dien tu
C.cac vat o nhiet doo tren 2000 do C chi phat ra tia hong ngoai
d.Tac dung noi bat cua tia hong ngoai la tac dung nhiet