Whenever light waves are restricted to a specific plane they are said to be
Diffracted
Refracted
Diffused
Regularly reflected
Plane polarized
Correct answer is E
No explanation has been provided for this answer.
2cm
3.3cm
4cm
5cm
15cm
Correct answer is C
M=\(\frac {v}{u}=5\Rightarrow v=5u=20,let u be x\\ v=5x if v=20 then 5x=20 therefore x=20/5=4\,u=4cm\)
Diffraction
Reflection
Refraction
Polarisation
Interference
Correct answer is C
No explanation has been provided for this answer.
Which of the following explains why a thick glass cup cracks when boiling water is poured into it?
Unequal expansion of the exterior and interior walls of the cup
Anomalous expansion of the water
Greater specific latent capacity of water compared with that of glass
Large increase in the heat capacity of the cup
High density of the water
Correct answer is A
No explanation has been provided for this answer.
1.2x \(10^{-1}cm\)
7.2x\(10^{-1}cm\)
6x\(10^{-1}cm\)
3.6x\(10^{-2}cm\)
1.8x\(10^{-1}cm\)
Correct answer is D
\(\alpha= \frac{\Delta{L}}{L_1\Delta\theta}; \Delta{L}=\alpha{L_1}\Delta\theta\Rightarrow 1.0\times 10^{-5}\times 300\times (40-28)= 0.036 or 3.6\times 10^{-2}\)