Which of the following statements about light is incorrect?
A.Light is energy
B.Light cannot travel through vacuum
C.Light travels in waves
D.Velocity of light is greater than the velocity of sound
A.Light is energy
B.Light cannot travel through vacuum
C.Light travels in waves
D.Velocity of light is greater than the velocity of sound
A.0.012 eV
B.0.12 eV
C.1.2 eV
D.12 eV
A.arises because of the interaction of winds with the surface of oceans
B.available varies with the size and frequency of waves
C.of about 10 kW is available for every metre of wave front
D.all of the above
A.21-Mar
B.21-Jun
C.22-Sep
D.21-Dec
A.It is structurally too weak
B.It absorbs too much of the incoming radiation
C.Opacity to long wavelength radiation is reduced
D.It is too expensive for routine use in collectors
A.Use of a selective surface
B.Use of an anti-reflective coating
C.Use of three cover plate
D.Use of an evacuated collector
A.Bougers law
B.Snells law
C.Wiens law
D.Hottel – Whillier-Bliss equation
A.Salinity difference
B.Temperature difference
C.Pressure difference
D.Density difference
A.corona
B.chromoshpere
C.photoshere
D.suns interior