Converging and diverging beams of light

In the figure shown a converging lens and a diverging lens of focal lengths 20cm and -5cm respectively are separated by a distance such that a paralel beam of light of intensity 100 watt//m^(2) incident on the converging lens comes out as parallel beam from the diverging lens. Find the intensity of the outgoing beam in watt//m^(2)

Identify the True or False statements. a. A glass slab cannot deviate the light. b. A glass slab can produce lateral displacement. c. The shift produced by a slab depends ono the converging and diverging nature of beam. d. Apparent shift in case of a slab always occurs in the direction of light ray travelling. e. The shift produced by a slab can never exceed its thickness.

A lamp emits a .............. (convergent/divergent) beam of light.

A converging lens and a diverging mirror are placed at a separation of 15 cm. The focal length of the lens is 25 cm and that of the mirror is 40 cm. Where should a point source be placed between the lens and the mirror so that the light, after getting reflected by the mirror and then getting transmitted by the lens, comes out parallel to the principal axis ?

A converging lens and a diverging mirror are placed at a separation of 20 cm. The focal length of the lens is 30 cm and that of the mirror is 50 cm. Where should a point source be placed between the lens and the miror, so that the light, after getting reflected by the mirror and then getting transmitted by the lens, comes out parallel to the principal axis?

When a thin metal plate is placed in the path of one of the interfering beams of light

When a thin metal plate is placed in the path of one of the interfering beams of light

Name the spherical mirror which (i) diverges (ii) converges the beam of light incident on it. Justify your answer by drawing a ray diagram in each case.

Explain convergent and divergent evolution with the help of one example of each.

Explain convergent and divergent evolution with the help of one example of each.