When the same monochromatic ray of light travels through glass slab and through water, the number of waves in glass slab of thickness 6 cm is same as

Question

When the same monochromatic ray of light travels through glass slab and through water, the number of waves in glass slab of thickness 6 cm is same as

When the same monochromatic ray of light travels through glass slab and through water, the number of waves in glass slab of thickness 6 cm is same as in water column of height 7 cm. If refractive index of glass is `1.5`, then refractive index of water is
A. 1.258
B. 1.269
C. 1.286
D. `1.310`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Related Questions

The optical path of a monochromatic light is same if, it goes thoruhg `4.0cm` of glass or `4.5cm` of water. If the refractive inded of glass is 1.53,

2 Answers 4 Views

When a glass slab is placed on a cross made on a sheet, the cross appears to be raised by `1cm`. The thickness of the glass is `3cm`. The critical ang

2 Answers 4 Views

The refractive index of water is `4//3` and that of glas is `5//3`. What will be the critical angle for the ray of light entering water form the glass

2 Answers 4 Views

The optical path of a monochromatic light is same if it goes through `4.0cm` of glass of `4.5cm` of water. If the refractive index of glas is `1.53`,

2 Answers 5 Views

A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after refraction its velocity is reduced by 20%.

2 Answers 5 Views

A ray of light is incident normally on a glass slab of thickness 5 cm and refractive index 1.6. The time taken to travel by a ray from source to surfa

2 Answers 5 Views

A parallel beam of monochromatic light is incident on a glass slab at an angle of incidence `60^(@)`. Find the ratio of width of the beam in the glass

2 Answers 5 Views

Light travels through a glass plate of thickness t and refractive index `mu.` If c is the speed of light in vacuum, the time taken by light to travel

2 Answers 4 Views

A glass slab of thickness `4 cm` contains the same number of waves as `5 cm` of water, when both are traversed by the same monochromatic light. If the

2 Answers 4 Views

(a) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the inci

2 Answers 4 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - C
As, we know number of waves in glass slab
`=` number of waves in water column
where, `mu_(g) =` refractive index in glass,
`mu_(w) =` refractive index of water column,
`h_(g) =` thickness of slab and `h_(w) =` height of water column.
Given, `mu_(g) = 15, h_(g) = 6 cm, h_(w) = 7` cm
`rArr mu_(w) = (mu_(g).h_(g))/(h_(w)) = (15 xx 6)/(7)`
`:. mu_(w) = 9/7 = 1.286`