A Circle has a number of tangents equal to _________?
A Circle has a number of tangents equal to _________?
A. 0
B. 1
C. 2
D. Infinite
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If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?
If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?A. chromatic aberration
B. spherical aberration
C. both spherical and chromatic
D. distortionA thing that emits its own light is___________________?
A thing that emits its own light is___________________?A. luminous
B. non-luminous
C. incandescent
D. brightIf electrical conductivity increases with the increase of temperature of a substance, then it is a:
If electrical conductivity increases with the increase of temperature of a substance, then it is a:A. Semiconductor
B. Conductor
C. Insulator
D. None of the aboveCompton effect proves the________________?
Compton effect proves the________________?A. Photon theory of light
B. Dual nature of light
C. Wave nature of light
D. Uncertain nature of lightIn monochromatic red light a blue book will probably appear to be_________________?
In monochromatic red light a blue book will probably appear to be_________________?A. black
B. purple
C. green
D. no scientific reasoning availableThe natural frequency of simple pendulum depends upon_______________?
The natural frequency of simple pendulum depends upon_______________?A. It’s mass
B. It’s length
C. Square of its length
D. The square root of its length