MCQ
Brewster's law is :
- A$ \mu=\sin i_{p} $
- B$ \mu=\cos i_{p} $
- ✓$ \mu=\tan i_{p} $
- D$ \mu=\tan^{2}i_{p} $
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We combined a convex lens of focal length f1 and concave lens of focal lengths f2 and their combined focal length was F. The combination of these lenses will behave like a concave lens, if
|
(a) f1 > f2 |
(b) f1 < f2 |
(c) f1 = f2 |
(d) f1 ≤ f2 |
The threshold wavelength for photoelectric effect of a metal is 6500 Å. The work function of the metal is approximately
|
(a) 2 eV |
(b) 1 eV |
(c) 0.1 eV |
(d) 3 eV |