Physics-
General
Easy

Question

A parallel sided block of glass of refractive index 1.5 which is 36 mm thick rests on the floor of a tank which is filled with water (refractive index = 4/3). The difference between apparent depth of floor at A & B when seen from vertically above is equal to

  1. 2 mm    
  2. 3 mm    
  3. 4 mm    
  4. none of these    

The correct answer is: 3 mm

Related Questions to study

General
physics-

Look at the ray diagram shown, what will be the focal length of the 1st and the 2nd lens, if the incident light ray passes without any deviation?

Look at the ray diagram shown, what will be the focal length of the 1st and the 2nd lens, if the incident light ray passes without any deviation?

physics-General
General
physics-

A cubical block of glass of refractive index n1 is in contact with the surface of water of refractive index n2. A beam of light is incident on vertical face of the block (see figure). After refraction, a total internal reflection at the base and refraction at the opposite vertical face, the ray emerges out at an angle theta. The value of theta is given by :

A cubical block of glass of refractive index n1 is in contact with the surface of water of refractive index n2. A beam of light is incident on vertical face of the block (see figure). After refraction, a total internal reflection at the base and refraction at the opposite vertical face, the ray emerges out at an angle theta. The value of theta is given by :

physics-General
General
physics-

From the figure shown establish a relation between, mu subscript 1 end subscript, mu subscript 2 end subscript, mu subscript 3 end subscript.

From the figure shown establish a relation between, mu subscript 1 end subscript, mu subscript 2 end subscript, mu subscript 3 end subscript.

physics-General
parallel
General
physics-

An object is placed 20 cm in front of a 4 cm thick plane mirror. The image of the object finally is formed at 45 cm from the object itself . The refractive index of the material of the unpolished side of the mirror is (considering near normal incidence)

An object is placed 20 cm in front of a 4 cm thick plane mirror. The image of the object finally is formed at 45 cm from the object itself . The refractive index of the material of the unpolished side of the mirror is (considering near normal incidence)

physics-General
General
physics-

In the figure shown fraction numerator sin invisible function application i over denominator sin invisible function application r end fraction is equal to

In the figure shown fraction numerator sin invisible function application i over denominator sin invisible function application r end fraction is equal to

physics-General
General
physics-

A long rectangular slab of transparent medium is placed on a horizontal table with its length parallel to the x-axis and width parallel to the y-axis as shown in the figure. A ray of light travelling in air makes a normal incidence on the slab. The refractive index m of the medium varies as fraction numerator mu subscript 0 end subscript over denominator 1 minus left parenthesis x divided by r right parenthesis end fraction comma text  where  end text mu subscript 0 end subscript text  and  end text r left parenthesis greater than d right parenthesis text  are constants end text

A long rectangular slab of transparent medium is placed on a horizontal table with its length parallel to the x-axis and width parallel to the y-axis as shown in the figure. A ray of light travelling in air makes a normal incidence on the slab. The refractive index m of the medium varies as fraction numerator mu subscript 0 end subscript over denominator 1 minus left parenthesis x divided by r right parenthesis end fraction comma text  where  end text mu subscript 0 end subscript text  and  end text r left parenthesis greater than d right parenthesis text  are constants end text

physics-General
parallel
General
physics-

The figure shows the path of a ray of light as it passes through three different materials with refractive indices n1, n2 and n3. The figure is drawn to scale. The refractive indices of the material satisfy relation

The figure shows the path of a ray of light as it passes through three different materials with refractive indices n1, n2 and n3. The figure is drawn to scale. The refractive indices of the material satisfy relation

physics-General
General
physics-

Bottom face of the glass cube is silvered as shown. A ray of light incident on top face of the cube as shown. Find the deviation of the ray when it comes out of the glass cube :

Bottom face of the glass cube is silvered as shown. A ray of light incident on top face of the cube as shown. Find the deviation of the ray when it comes out of the glass cube :

physics-General
General
physics-

In the figure shown the angle made by the light ray with the normal in the medium of refractive index 1 is :

In the figure shown the angle made by the light ray with the normal in the medium of refractive index 1 is :

physics-General
parallel
General
physics-

A ray R1 is incident on the plane surface of the glass slab (kept in air) of refractive index square root of 2 at angle of incident equal to the critical angle for this air glass system. The refracted ray R2 undergoes partial reflection & refraction at the other surface. The angle between reflected ray R3 and the refracted ray R4 at that surface is :

A ray R1 is incident on the plane surface of the glass slab (kept in air) of refractive index square root of 2 at angle of incident equal to the critical angle for this air glass system. The refracted ray R2 undergoes partial reflection & refraction at the other surface. The angle between reflected ray R3 and the refracted ray R4 at that surface is :

physics-General
General
physics-

The distance of a real object from the focus of a convex mirror of radius of curvature 'a' is 'b'. Then the distance of the image from the focus is

The distance of a real object from the focus of a convex mirror of radius of curvature 'a' is 'b'. Then the distance of the image from the focus is

physics-General
General
physics-

A straight line joining the object point and image point is always perpendicular to the mirror

A straight line joining the object point and image point is always perpendicular to the mirror

physics-General
parallel
General
physics-

In the figure shown if the object ‘O’ moves towards the plane mirror, then the image I (which is formed after successive reflections from M1 & M2 respectively) will move:

In the figure shown if the object ‘O’ moves towards the plane mirror, then the image I (which is formed after successive reflections from M1 & M2 respectively) will move:

physics-General
General
physics-

A reflecting surface is represented by the equation Y equals fraction numerator 2 L over denominator pi end fraction s i n invisible function application open parentheses fraction numerator pi x over denominator L end fraction close parentheses comma 0 less or equal than x less or equal than L. A ray travelling horizontally becomes vertical after reflection. The coordinates of the point (s) where this ray is incident is

A reflecting surface is represented by the equation Y equals fraction numerator 2 L over denominator pi end fraction s i n invisible function application open parentheses fraction numerator pi x over denominator L end fraction close parentheses comma 0 less or equal than x less or equal than L. A ray travelling horizontally becomes vertical after reflection. The coordinates of the point (s) where this ray is incident is

physics-General
General
physics-

A ray of light is incident on a concave mirror. It is parallel to the principal axis and its height from principal axis is equal to the focal length of the mirror. The ratio of the distance of point B to the distance of the focus from the centre of curvature is (AB is the reflected ray)

A ray of light is incident on a concave mirror. It is parallel to the principal axis and its height from principal axis is equal to the focal length of the mirror. The ratio of the distance of point B to the distance of the focus from the centre of curvature is (AB is the reflected ray)

physics-General
parallel

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.