PHY103 Past Questions

PHY103

If a ray of light strikes a pane of glass at 45 degrees to the normal, it
Answer: leaves with the same angle to the normal, but is deflected to the side.

Incident ray, refracted ray and normal ray all lie on same plane, as per
Answer: first law of refraction

A ray of light passing through the focal point at an angle to the optic axis of a concave mirror is reflected back
Answer: parallel to the optic axis.

A ray reflected from a retroreflector
Answer: travels in the direction opposite that

A diverging lens has a focal length of 10 cm. Where is the image located when an object is placed 30 cm from the lens?
Answer: 7.5 cm on the near side

For a converging lens, a ray arriving parallel to the optic axis
Answer: passes through the principal focal point

The shortest mirror in which a creature from outer space can see its entire body is its height.
Answer: one half

As per second law of refraction, ratio of sine of angle of incidence to sine of angle of refraction is
Answer: a constant

Where is the image located when an object is placed 30 cm from a convex mirror with a focal length of 10 cm? Note: you should have to figure this out exactly. Only one answer is in the right ballpark.
Answer: 7.5 cm in back

Ratio (speed of light in air or vacuum/speed of light in a medium) is equal to
Answer: none of the above

An optical medium where speed of light is slower than another is said to be
Answer: optically denser

For each angle of incidence, corresponding value of angle of reflection is
Answer: same

A ray of light parallel to the optic axis of a concave mirror is reflected back
Answer: through the focal point

The back surfaces of automobile headlights are curved
Answer: to concentrate light in one direction

Bending effect of light as it passes from one transparent material into other is known as
Answer: refraction

The dispersion of light when it passes through a prism shows that
Answer: different colors have different indices of refraction

A diverging lens has a focal length of 10 cm. Where is the image located when an object is placed 30 cm from the lens?
Answer: through the center of the sphere

What type of image is formed when an object is placed at a distance of 1.5 focal lengths from a convex mirror?
Answer: erect and virtual

What happens to the image produced by a pinhole camera when you move the back wall farther from the pinhole? It becomes
Answer: larger and fainter

Click here to follow on Twitter for your Free Exam Summary and free past questions

Whatsapp Chat: 08039407882 for your Project Writeup I Business Plan Writeup I Online Tutorial

Leave a Reply

MEET OVER 2000 NOUN STUDENTS HERE. 

Join us for latest NOUN UPDATES and Free TMA answers posted by students on our Telegram. 

OUR ONLINE TUTORIAL CLASS IS NOW ON!!! JOIN US NOW. 
JOIN NOW!
close-link