When can it be assumed that light moves in a straight line

Assertion: When a person walks on a rough surface, the frictional force exerted by the surface on the person is opposite to the direction of tendenc of motion his leg. Reason: If a body moves with constant velocity, then it means that body is moving along straight line & there is no acceleration.

Assertion: The distance and displacment both are equal when the particle moves in a straight line. Reason: In straight line motion distance travelled= Idisplacement I.

Light moves in a straight line. Because ......

Light moves in a straight line. Because ......

When a body is subjected to a uniform acceleration, it always moves in a straight line. Straight line motion is the natural tendency of the body.

What is // are the possible graph // graphs, if particle moves in a straight line path according to the give distance - time graph?

A chord of length 64 m is used to connected a 100 kg astronaut to spaceship whose mass is much larger than that of the astronuat. Estimate the value of the tension in the cord. Assume that the spaceship is orbiting near earth surface. Assume that the spaceship and the astronaut fall on a straight line from the earth centre. the radius of the earth is 6400 km .

Light appears to travel in a straight line because....

Can a body have the momentum if it moves along a straight path?

Two particle are oscillating along two close parallel straight lines side by side, with the same frequency and amplitude. They pass each other, moving on opposite directions when their displacement is half of the amplitude. The mean positions of the two particles lie on a straight line perpendicular to the paths of the two particles. The phase difference is.........