Chapter 9 – Ray Optics

Refraction of light from air to glass and from air to water are shown in figure (i) and figure (ii) below. The value of the angle θ in the case of refraction as shown in figure (iii) will be Refraction of light from air to glass and from air to water are shown in figure [...]

Light travels in two media A and B with speeds 1.8×10^8 ms^–1 and 2.4×10^8 ms^–1 respectively. Then the critical angle between them is Light travels in two media A and B with speeds 1.8×10^8 ms^–1 and 2.4×10^8 ms^–1 respectively. Then the critical angle between them is November 8, 2020 Category: Chapter 9 - Ray Optics [...]

A glass slab of thickness 8 cm contains the same number of waves as 10 cm long path of water when both are traversed by the same monochromatic light. If the refractive index of water is 4/3, the refractive index of glass is A glass slab of thickness 8 cm contains the same number of [...]

A beam of monochromatic light reflects and refracts at point A, as shown in the diagram. Find the angle of refraction at point A. A beam of monochromatic light reflects and refracts at point A as shown in the diagram. Find the angle of refraction at point A. November 8, 2020 Category: Chapter 9 - [...]

A ray of light is incident at an angle i on a glass slab of refractive index μ. The angle between reflected and refracted light is 90^o . Then the relationship between i and μ is. A ray of light is incident at an angle i on a glass slab of refractive index μ. The [...]

Light of certain colour has 2000 waves to millimeter in air. what will be the wavelength of this light in a medium of refractive index 1.25?​ Light of certain colour has 2000 waves to millimeter in air. what will be the wavelength of this light in a medium of refractive index 1.25?​ November 8, 2020 [...]

If ϵ0 ​and μ0 ​are the permittivity and permeability of free space and ϵ and μ are the corresponding quantities for a medium, then refractive index of the medium is: If ϵ0 ​and μ0 ​are the permittivity and permeability of free space and ϵ and μ are the corresponding quantities for a medium then refractive [...]

The radius of curvature of concave mirror is 24 cm and the image is magnified by 1.5 times. The object distance is The radius of curvature of concave mirror is 24 cm and the image is magnified by 1.5 times. The object distance is November 8, 2020 Category: Chapter 9 - Ray Optics , MTG [...]

Two objects A and B when placed in front of a concave mirror of focal length 7.5cm, give images of equal size. If A is three times the size of B and is placed 30cm from the mirror, what is the distance of B from the mirror? give images of equal size. If A is [...]

Two mirrors at an angle θ produce 5 images of a point. The number of images produced when θ is decreased to θ−30 is Two mirrors at an angle θ produce 5 images of a point. The number of images produced when θ is decreased to θ−30 is November 8, 2020 Category: Chapter 9 - [...]