With reference to 'Visible Light Communication' (VLC) technology, which of the following statements is/are correct? 1. VLC uses electromagnetic spectrum wavelengths between 375 and 780 nm. 2. VLC is known as Li-Fi (Light Fidelity). 3. VLC cannot pass through opaque objects. Select the correct answer:

Who was appointed as the new Chairperson of the 'National Green Tribunal' (NGT) in March 2026?

The tri-service military exercise 'Dweep Shakti', conducted from March 24 to 28, 2026, primarily aimed at strengthening which capabilities?

What is the maximum strength of the Lok Sabha as per the Constitution?

If the length of a rectangle is increased in the ratio 4:5 and the breadth is decreased in the ratio 3:2, find the ratio in which the area of the rectangle will change.

What is the maximum strength of the Lok Sabha as provided in the Constitution?

The perimeter of a rectangle is 40 cm. If its length is 12 cm, what is its breadth?

A 240m long train crosses a platform in 20 seconds. If its speed is 72 km/h, what is the length of the platform?

If a rectangle's length is increased by 20% and its breadth is decreased by 10%, what is the net effect on its area?

The ratio of the length and breadth of a rectangular plot is 7 : 5. If the perimeter is 480 meters, find the area of the plot.

The ratio of the length of a rod and its shadow is 1:√3. The angle of elevation of the sun is:

If a rectangle's length is doubled and its breadth is halved, what happens to its area?

The ratio of the length and breadth of a rectangular field is 3 : 2. If the perimeter is 80m, find its area.

What is the standard length of a marathon race?

What is the maximum strength of members in the Rajya Sabha?

The ratio of the length and breadth of a rectangular plot is 5 : 4. If the breadth is 20 meters less than the length, what is the perimeter of the plot?

If the length of a rectangle is increased by 20% and its breadth is decreased by 10%, what is the percentage change in its area?

If a rectangle's length is doubled and its width is halved, what happens to the area?

If the length of a rectangle is increased by 20% and the breadth is decreased by 10%, what is the percentage change in its area?

What is the maximum strength of the 'Rajya Sabha' as fixed by the Constitution?