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Question #246611

Optics

Choose the correct option-

The phenomenon which occurs when a ray of light strikes a surface normally-

a. Total internal reflection

b. Refraction

c. Partial reflection

d. Scattering

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Question #245832

Optics

as a fish floats on a surface of water its angle of vision is alpha , as it dives into water it becomes beta..... compare the two angles

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Question #242803

Optics

Light travels through a medium with an index of refraction of 1.04.It comes to the surface of another medium at an angle of 83 degree. If the index of refraction for this medium is 2.1, what angle does the refracted light make with respect to the surface?

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Question #242599

Optics

Consider point ions of mass 'M' and charge 'e' immersed in a uniform sea of conduction electrons.The ions are imagined to be in stable equilibrium when at regular lattice points. If one ion is displaced a small distance 'r' from its equilibrium position, the restoring force is largely due to the electric charge within the sphere of radius 'r' centered at the equilibrium position. Take the number density of ions (or of conduction electrons) as 34πR3, which defines R.
Estimate the order of magnitude of the velocity of sound in the metal?

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Question #242598

Optics

Consider point ions of mass 'M' and charge 'e' immersed in a uniform sea of conduction electrons.The ions are imagined to be in stable equilibrium when at regular lattice points. If one ion is displaced a small distance 'r' from its equilibrium position, the restoring force is largely due to the electric charge within the sphere of radius 'r' centered at the equilibrium position. Take the number density of ions (or of conduction electrons) as 34πR3, which defines R.
The value of this frequency for sodium can be roughly estimated to be:

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Question #242412

Optics

Light in air is incident on a piece of crown glass at an angle of 35 degreee relative to the normal. What is the angle of refraction in the glass?

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Question #241488

Optics

an astronomical telescope with small amplitude has an objective whose power is 2 diopters. the lens is placed 60 cm from the eye piece, when the telescope is adjusted for minimum eye strain. calculate the angular magnification of telescope.

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Question #241148

Optics

The image received of absorbed x rays is A. Inverted
C. Any of a orb B. Real

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Question #241147

Optics

The wavelength of beta rays is measured by A. Interference
C. Absorption B. Polarization

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Question #241128

Optics

When electron strikes with Al plate which photon is emitted'

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