Related InterviewSolutions

• Can you ever have a situation in which a light ray goes undeviated through a prism?
• Two concave lenses L1 and L2 are kept in contact with each other. If the space between the two lenses is filled with a material of refractive index μ=1 the magnitude of the focal length of the combination(a) becomes undefined(b) remains unchanged(c) increases(d) decreases
• Consider three converging lenses L1, L2 and L3, having identical geometrical construction. The index of refraction of L1 and L2 are μ1, and μ2, respectively. The upper half of the lens L3 has a refractive index and the lower half has μ2 (figure 18-Q4). A point object O is imaged at O1, by the lens L2, and at O2 by the lens L2 placed in same position. If L3 i s placed at the same place,(a) there will be an image at O1,(b) there will be an image at O2.(c) the only image will form somewhere between O1 and O2,(d) the only image will form away from O2.
• A thin lens is made with a material having a refractive index µ = 1.5. Both the sides are convex. It is dipped in water (µ = 1.33). It will behave like  (a) a convergent lens (b) a divergent lens (c) a rectangular slab (d) a prism
• Is the formula "Real depth/Apparent depth =µ" valid if viewed from a position quite away from the normal?
• Mark the correct options.(a) If the incident rays are converging, we have a real object.(b) If the final rays are converging, we have a real image.(c) The image of a virtual object is called a virtual image.(d) If the image is virtual, the corresponding object is called a virtual object.
• If the light moving in a straight line bends by a small but fixed angle, it may be a case of(a) reflection(b) refraction(c) diffraction(d) dispersion.
• A convex lens is made of a material having refractive index 1.2. Both the surfaces of the lens are convex. If it is dipped into water (μ = 1'33), it will behave like(a) a convergent lens(b) a divergent lens(c) a rectangular slab(d) a prism.
• The image formed by a concave mirror(a) is always real(b) is always virtual(c) is certainly real if the object is virtual(d) is certainly virtual if the object is real.
• A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at(a) infinity(b) pole(c) focus(d) 15 cm behind the mirror.