Advertisements
Advertisements
प्रश्न
There are certain material developed in laboratories which have a negative refractive index (Figure). A ray incident from air (medium 1) into such a medium (medium 2) shall follow a path given by.
विकल्प
उत्तर
Explanation:
The materials with negative refractive index respond to Snell’s law just the opposite way. If an incident ray from air (Medium 1) incident on those materials, the ray refract or bend the same side of the normal.
APPEARS IN
संबंधित प्रश्न
A tank is filled with water to a height of 12.5 cm. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4 cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.63 up to the same height, by what distance would the microscope have to be moved to focus on the needle again?
Does the apparent depth of a tank of water change if viewed obliquely? If so, does the apparent depth increase or decrease?
The refractive index of a material changes by 0.014 as the colour of the light changes from red to violet. A rectangular slab of height 2.00 cm made of this material is placed on a newspaper. When viewed normally in yellow light, the letters appear 1.32 cm below the top surface of the slab. Calculate the dispersive power of the material.
A pole of length 1.00 m stands half dipped in a swimming pool with water level 50.0 cm higher than the bed. The refractive index of water is 1.33 and sunlight is coming at an angle of 45° with the vertical. Find the length of the shadow of the pole on the bed.
Locate the image formed by refraction in the situation shown in figure.
Obtain the equation for radius of illumination (or) Snell’s window.
Obtain the equation for lateral displacement of light passing through a glass slab.
The critical angle is maximum when light travels from ______.
`(a^mu"w"=4/3,a^mug=3/2)`
When a ray of light is incident normally on one refracting surface of an equilateral prism of refractive index 1.5, the emerging ray ______.
`[sin^-1(1/1.5)=41.8^circ]`
A ray of unpolarised light is incident on the surface of glass plate of µ = 1.54 at polarising angle, then angle of refraction is