CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

Two lines A and B of an X-ray give second order reflection maximum at a glancing angle of 60 and third order reflection maximum at an angle of 30 respectively from the face of the same crystal. If the wavelength of line B is 0.25 nm, then the wavelength of line A will be -

A
0.65 nm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
0.35 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
0.95 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
0.15 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 0.65 nm
From Bragg's Law,

2dsinϕ=nλ

As crystal is same, d= constant

nλsinϕ= constant

So,

n1λ1sinϕ1=n2λ2sinϕ2

2×λ1sin60=3×0.25sin30

​​​​​​​λ1=0.65 nm

​​​​​​​​​​​​​​Hence, option (A) is the correct answer.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Integrated Rate Equations
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon