The "f" number of the lens is the ratio of the:
Afocal length of the lens to the effective aperture
Beffective aperture to the focal length of the lens
Cmagnifying power lens to effective aperture
Deffective aperture to magnifying power of lens
ESAS · Question Bank
Physics
107 of 236 questions match · page 6 of 6. Answer in your head first, then check the solution.
What is an electromagnetic radiation of very short wavelength emitted from the nucleus of a radiactive atom?
ABeta ray
BAlpha ray
CGamma ray
DX-ray
A spectrum consisting of monochromatic slit images having wavelengths characteristic of the atoms parent is called __________
Aline spectrum
Bcontinous spectrum
Cslit spectrum
Dimage spectrum
What refers to property os sound waves which depends on the number of harmonics present and on their prominence?
APitch
BQuality
CHarmonic
DFundamental
What refers to the failure of one set of color receptors in the eye to be simulated?
ARetinal failure
BRetinal fatigue
CPupil imperfection
DAstigmatism
The theory that the retina of the eye is provided with three sets of receptors, each of which is sensitive to one of the primary colors is known as _________
ATrue color vision theory
BYoung-Helmholtz color vision theory
CPrimary vision theory
DYoung-Huygens primary vision theory
A tempered scale is a musical scale with ________ equal frequency ratio intervals between the sucessive notes of an octave
A9
B10
C11
D12