Ray Optics and ...

In the figure ABC is the cross section of a right angled prism and BCDE is the cross section of a glass slab. The value of $$\theta$$ so that light incident normally on the face AB does not cross the face BC is (given sin$$^{-1}$$ (3/5) $$=$$ 37$$^o$$)

Rising and setting sun appears to be reddish because:

A ray incident at a point at an angle of incidence $$\theta$$  enters into a glass sphere placed in air which is reflected and refracted at the farther surface of the sphere as shown in the figure. The angle between reflected and refracted rays at this surface is $$90^{0}$$. If refractive index of the sphere is $$\sqrt{3} ,$$ the angle $$\theta$$  is :

A glass prism of $$\mu=$$ 1.5 is immersed in water of $$ [\mu= \frac{4}{3}]$$ as shown in this figure. A ray of light incident normally on face AB is totally reflected at the face AC if $$sin\theta$$  is 

The angle of crown glass $$(\mu=1.52)$$ prism is $$5^o$$. What should be the angle of flint glass $$(\mu=1.63)$$ prism so that the two prisms together may be used in a direct vision spectroscope?

The lens of a simple magnifier has a focal length of 2.5 cm. Calculate the angular magnification produced when the image is at the least distance of distinct vision.

A glass prism of refractive index $$1.5$$ is immersed in water (refractive index $$4/3)$$. A light beam normally on the face $$AB$$ is totally reflected to reach on the face $$BC$$ if

A parallel beam of light falls on a solid transparent sphere. Which of the following options is/are correct?

In Fig., $$ABC$$ is the cross section of a right-angled prism and $$ACDE$$ is the cross section of a glass slab. The value of $$\theta$$ so that light incident normally on the face $$AB$$ does not cross the face $$AC$$ is (given $$\sin^{-1} (3/5) = 37^{\circ})$$.

A ray of light enters a spherical drop of water of refractive index $$\mu$$ as shown in fig. An expression of the angle between incident ray and emergent ray (angle of deviation) as shown in fig. is :