Recent questions tagged marks2

0 votes

0 answers

Answer the following questions: Ray optics is based on the assumption that light travels in a straight line. Diffraction effects (observed when light propagates through small apertures/slits or around small obstacles) disprove this assumption. Yet the ray optics assumption is so commonly used in understanding location and several other

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Two towers on top of two hills are 40 km apart. The line joining them passes 50 m above a hill halfway between the towers. What is the longest wavelength of radio waves, which can be sent between the towers without appreciable diffraction

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Answer the following questions: When a low flying aircraft passes overhead, we sometimes notice a slight shaking of the picture on our TV screen. Suggest a possible

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Answer the following questions: As you have learnt in the text, the principle of linear superposition of wave displacement is basic to understanding intensity distributions in diffraction and interference patterns. What is the justification of this

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Laser light of wavelength 630 nm incident on a pair of slits produces an interference pattern in which the bright fringes are separated by 7.2 mm. Calculate the wavelength of another source of laser light which produce interference fringes separated by 8.1 mm using same pair of

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

How will the interference pattern in Young's double slit experiment get affected, when(i) distance between the slits `S_1 and S_2` reduced and (ii) the entire set up is immersed in water? Justify your answer in each

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The figure shows a double slit experimental set up for observing interference fringes due to different interference component colours of white light. What would be the predominant colour of the fringes observed at the point.(i) O (the central point) (ii) P, where, `S_2P - S_1P =(lambda_b)/2` ? (here, `lambda_b` is the wavelength of the blue

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Find an expression for intensity of transmitted light, when a polaroid sheet is rotated between two crossed polaroids. In which position of the Polaroid sheet will the transmitted intensity be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

For a single slit of width a, the first minimum of the interference pattern of `a `monochromatic light of wavelength `lambda`, occurs at an angle of `lambda//a`. At the same angle of `lambda//a`, we get a maximum for two narrow slits separated by a distance `a`.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A parallel beam of light of wavelength 500 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1 m away. It is observed that the first minimum is at a distance of 2.5 mm from the centre of the screen. Calculate the width of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Yellow light `(lambda, = 6000 A^o)` illuminates a single slit of width `1xx10^(-4)m`. Calculate the distance between two dark lines on either side to the central maximum, when the diffraction pattern is viewed on a screen kept 1.5 m away from the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

State briefly two features which can distinguish the characteristic features of an interference pattern from those observed in the diffraction pattern due to a single

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In a single slit diffraction experiment, a monochromatic source of light of wavelength `lambda` illuminates a narrow slit of width `a.` Show giving appropriate reasoning, that the half angular width of the central maximum in the observed pattern is (nearly) equal to

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a light beam incident from air to a glass slab at Brewster’s angle as shown in Fig. A polaroid is placed in the path of the emergent ray at point P and rotated about an axis passing through the centre and perpendicular to the plane of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider sunlight incident on a slit of width 104 A. The image seen through the slit

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a ray of light incident from air onto a slab of glass (refractive index n) of width d, at an angle θ. The phase difference between the ray reflected by the top surface of the glass and the bottom surface is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In a Young’s double slit experiment, the source is white light. One of the holes is covered by a red filter and another by a blue filter. In this

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Fig. shows a standard two slit arrangement with slits S1, S2. P1, P2 are the two minima points on either side of P (Fig. ). At P2 on the screen, there is a hole and behind P2 is a second 2- slit arrangement with slits S3, S4 and a second screen behind

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Two source `S_1` and `S_2` of intensity `I_1` and `I_1` are placed in front of a screen [Fig. (a)]. The patteren of intensity distribution seen in the central portion is given by Fig. (b). In this case which of the following statements are true.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider sunlight incident on a pinhole of width 103A. The image of the pinhole seen on a screen shall

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

Recent questions tagged marks2

Categories