Physics M.C.Q (1 Marks)

Continuous spectrum is not due to

The spectrum of iodine gas under white light will be

Line spectrum was first of all theoretically explained by

Line spectrum contains information about

At sun rise or sunset, the sun looks more red than at mid-day because

A ray of light incident normally on an isosceles right angled prism travels as shown in the figure. The least value of the refractive index of the prism must be

At the time of total solar eclipse, the spectrum of solar radiation would be

Three glass prisms A, B and C of same refractive index are placed in contact with each other as shown in figure, with no air gap between the prisms. Monochromatic ray of light OP passes through the prism assembly and emerges as QR. The conditions of minimum deviation is satisfied in the prisms

Deviation of 5° is observed from a prism whose angle is small and whose refractive index is 1.5. The angle of prism is

The band spectra (characteristic of molecular species) is due to emission of radiation

For a material, the refractive indices for red, violet and yellow colour light are respectively 1.52, 1.64 and 1.60. The dispersive power of the material is

Minimum deviation is observed with a prism having angle of prism A, angle of deviation δ, angle of incidence i and angle of emergence e. We then have generally

The minimum deviation produced by a hollow prism filled with a certain liquid is found to be 30°. The light ray is also found to be refracted at angle of 30°. The refractive index of the liquid is

The refractive index of a material of a prism of angles 45°– 45° – 90° is 1.5. The path of the ray of light incident normally on the hypotenuse side is shown in
 

The refractive indices of violet and red light are 1.54 and 1.52 respectively. If the angle of prism is 10°, then the angular dispersion is

Light from sodium lamp is passed through cold sodium vapours, the spectrum of transmitted light consists of

When a white light passes through a hollow prism, then

The fine powder of a coloured glass is seen as

A circular disc of which 2/3 part is coated with yellow and 1/3 part is with blue. It is rotated about its central axis with high velocity, then it will be seen as

In the position of minimum deviation when a ray of yellow light passes through the prism, then its angle of incidence is

The angle of minimum deviation for a prism is 40° and the angle of the prism is 60°. The angle of incidence in this position will be

Flint glass prism is joined by a crown glass prism to produce dispersion without deviation. The refractive indices of these for mean rays are 1.602 and 1.500 respectively. Angle of prism of flint prism is 10°, then the angle of prism for crown prism will be
 

Band spectrum is characteristic of

The minimum temperature of a body at which it emits light is

If the refractive indices of crown glass for red, yellow and violet colours are 1.5140, 1.5170 and 1.5318 respectively and for flint glass these are 1.6434, 1.6499 and 1.6852 respectively, then the dispersive powers for crown and flint glass are respectively

Our eye is most sensitive for which of the following wavelength

By placing the prism in minimum deviation position, images of the spectrum

Which of the following element was discovered by study of Fraunhofer lines

Light rays from a source are incident on a glass prism of index of refraction μ and angle of prism α. At near normal incidence, the angle of deviation of the emerging rays is

The spectrum of light emitted by a glowing solid is

A parallel beam of monochromatic light is incident at one surface of a equilateral prism. Angle of incidence is 55° and angle of emergence is 46°. The angle of minimum deviation will be

A light ray is incident by grazing one of the face of a prism and after refraction ray does not emerge out, what should be the angle of prism while critical angle is C

The dispersive power is maximum for the material

The number of wavelengths in the visible spectrum

When white light passes through the achromatic combination of prisms, then what is observed

Dispersive power depends upon

In the formation of primary rainbow, the sunlight rays emerge at minimum deviation from rain-drop after

Angle of minimum deviation for a prism of refractive index 1.5 is equal to the angle of prism. The angle of prism is (cos 41° = 0.75)

The power of an achromatic convergent lens of two lenses is + 2D. The power of convex lens is + 5D. The ratio of dispersive power of convex and concave lens will be

The focal lengths of convex lens for red and blue light are 100 cm and 96.8 cm respectively. The dispersive power of material of lens is

Spherical aberration in a lens