SSC

A. They are longitudinal waves and material medium is not required for their propagation

B. They are transverse waves and material medium is required for their propagation

C. They are longitudinal waves and material medium is required for their propagation

D. They are transverse waves and material medium is not required for their propagation

A. Convex

B. Concave

C. Bifocal

D. Cylindracal

A. 1981

B. 1983

C. 1990

D. 1999

A. RADAR (Radio Detective & Ranging

B. SONAR (Sound Navigation & Ranging

C. law of reflection

D. law of diffraction

A. 1

B. 1,2

C. 1,2,3

D. 2,3

A. 1552

B. 1652

C. 1752

D. 1852

A. A ray passing from rarer to denser medium and not able to pass to denser medium at an angle greater than critical angle

B. A ray passing from denser to rarer medium and not able to pass to rarer medium at an angle greater than critical angle

C. A ray passing from either denser to rarer medium or rarer to denser medium and not able to pass any medium at an angle smaller than critical angle

D. None of the above

A. Max Planck

B. Albert Einstein and Otto Stern

C. Hendrik B. G. Casimir

D. Gribbin, John

A. Speed

B. Distance

C. Deapth

D. Accelration

A. Various wavelengths of light

B. dust, smoke and gas molecules

C. atmospheric pressure

D. None of the above