Physics-
General
Easy
Question
In the Figure, AB and BK represent incident and reflected rays. If angle BCF = 35º. Then 
. will be equal to ____ degrees
- 70º
- 35º
- 80º
- 90º
The correct answer is: 70º
Related Questions to study
physics-
Assertion : The net deviation suffered by a light ray incident on a plane mirror as shown in the figure is 
Reason : A ray of light is incident on a plane mirror at an angle i with the normal to the mirror. It strikes another plane mirror inclined at an angle 
with the first mirror. It is given that 
The net deviation produced after reflection once from each mirror is
.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion : The net deviation suffered by a light ray incident on a plane mirror as shown in the figure is
Reason : A ray of light is incident on a plane mirror at an angle i with the normal to the mirror. It strikes another plane mirror inclined at an angle with the first mirror. It is given that The net deviation produced after reflection once from each mirror is.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
physics-
Assertion : In YDSE number of bridge figure or dark fringe can not be unlimited
Reason : In YDSE path difference between the superposing waves can not be more than the distance between the slits.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion : In YDSE number of bridge figure or dark fringe can not be unlimited
Reason : In YDSE path difference between the superposing waves can not be more than the distance between the slits.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
physics-
Assertion : A beam of light containing radiations of only two wavelengths is incident on a prism. It is found that radiations of one wavelength come out from the face AC of the prism but radiations of other wavelength does not.
Reason : The condition of total internal reflection is satisfied for one wavelength and not for other.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion : A beam of light containing radiations of only two wavelengths is incident on a prism. It is found that radiations of one wavelength come out from the face AC of the prism but radiations of other wavelength does not.
Reason : The condition of total internal reflection is satisfied for one wavelength and not for other.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
physics-
In an interference arrangement similar to Young's double – slit experiment, the slits 
and 
are illuminated with coherent microwave sources, each of frequency 
The sources are synchronized to have zero phase difference. The slits are separated by a distance 
The intensity 
is measured as a function of 
where is defined as shown. If 
is the maximum intensity, then for 
is given by
In an interference arrangement similar to Young's double – slit experiment, the slits and are illuminated with coherent microwave sources, each of frequency The sources are synchronized to have zero phase difference. The slits are separated by a distance The intensity is measured as a function of where is defined as shown. If is the maximum intensity, then for is given by
physics-General
physics-
In an interference arrangement, similar to Young's double slit experiment, the slits 
and are illuminated with coherent microwave sources, each of frequency 
Hz. The sources are syn necrotized to have zero phase difference. The slits are separated by distance 
The intensity 
is measured as a function of where is defined as shown in figure. If is maximum intensity, then for 
is given by
In an interference arrangement, similar to Young's double slit experiment, the slits and are illuminated with coherent microwave sources, each of frequency Hz. The sources are syn necrotized to have zero phase difference. The slits are separated by distance The intensity is measured as a function of where is defined as shown in figure. If is maximum intensity, then for is given by
physics-General
physics-
A parallel narrow beam of light is incident on the surface of a transparent hemisphere of radius R and refractive index 
as shown. The position of the image formed by refraction at the spherical surface only is
A parallel narrow beam of light is incident on the surface of a transparent hemisphere of radius R and refractive index as shown. The position of the image formed by refraction at the spherical surface only is
physics-General
physics-
A glass prism of refractive index 1.5 is immersed in water 
Light beam incident normally on the face AB is totally reflected to reach the face BC if
A glass prism of refractive index 1.5 is immersed in water Light beam incident normally on the face AB is totally reflected to reach the face BC if
physics-General
physics-
Two identical sources P and Q emit waves in same phases and of same wavelength. Spacing between P and Q is 
The maximum distance from P along the x-axis at which a minimum intensity occurs is given by
Two identical sources P and Q emit waves in same phases and of same wavelength. Spacing between P and Q is The maximum distance from P along the x-axis at which a minimum intensity occurs is given by
physics-General
physics-
A thin isosceles prism with angle 4° and refractive index 1.5 is placed inside a transparent tube with water 
as shown. The deviation of light due to prism will be
A thin isosceles prism with angle 4° and refractive index 1.5 is placed inside a transparent tube with water as shown. The deviation of light due to prism will be
physics-General
physics-
A thin plano-convex lens of focal length 15 cm has its plane side silvered. An object is placed on the principle axis of the lens at a distance 20 cm from it as shown. The final position of the image is
A thin plano-convex lens of focal length 15 cm has its plane side silvered. An object is placed on the principle axis of the lens at a distance 20 cm from it as shown. The final position of the image is
physics-General
physics-
The slab of a material of refractive index 2 shown in figure has a curved surface APB of radius of curvature 10 cm and a plane surface CD. On the left of APB is air on the right of CD is water with refractive indices as given in the figure. An object O is placed at a distance of 15 cm the pole P as shown. The distance of the final image of O from P, as viewed normally from the left is
The slab of a material of refractive index 2 shown in figure has a curved surface APB of radius of curvature 10 cm and a plane surface CD. On the left of APB is air on the right of CD is water with refractive indices as given in the figure. An object O is placed at a distance of 15 cm the pole P as shown. The distance of the final image of O from P, as viewed normally from the left is
physics-General
physics-
An equiconvex lens is cut into two halves along (i) 
and (ii) 
as shown in the figure. Let 
be the focal lengths of completes lens, of each half in case (i), and of each half in case (ii), respectively. Choose the correct statement from the following.
An equiconvex lens is cut into two halves along (i) and (ii) as shown in the figure. Let be the focal lengths of completes lens, of each half in case (i), and of each half in case (ii), respectively. Choose the correct statement from the following.
physics-General
physics-
A concave mirror of radius R is kept on a horizontal table as shown. Water of refractive index 
is poured into it upto a height h. The height of the object O from water surface such that image is formed on it self is
A concave mirror of radius R is kept on a horizontal table as shown. Water of refractive index is poured into it upto a height h. The height of the object O from water surface such that image is formed on it self is
physics-General
physics-
A ray of light travels in the fashion as shown in the figure. After passing through water, the ray grazes along the water air interface. The value of 
in terms of i is
A ray of light travels in the fashion as shown in the figure. After passing through water, the ray grazes along the water air interface. The value of in terms of i is
physics-General
physics-
A concave mirror is placed over a beaker contacting water of 
and image of the object placed at the bottom of beaker is formed at a distance of 25 cm from the surface of water, then focal length of the mirror.
A concave mirror is placed over a beaker contacting water of and image of the object placed at the bottom of beaker is formed at a distance of 25 cm from the surface of water, then focal length of the mirror.
physics-General
