"1. Construct representing on a piece of paper a half-circle a mirror whose inside surface is silvered (see Fig. 19.23). Suppose you place a small lightbulb on the axis halfway between point R in Fig. 19.23 and the surface of the mirror. Now carefully draw three different rays that leave the lightbulb, reflect from the mirror, and move away. Would this mirror and light be useful for a headlight on your car? Explain. (Ignore the colored ray in Fig.19.23.) FIG. 19.23 Axis- R x=?

A ray of light crosses the boundary between some substance with n = 1.54 and air, going from the substance into air. If the angle of incidence is 29◦ what is the angle of refraction?   Calculate to 1decimal.

Light in air approaches the boundary of oil at an angle of 36.1 degrees with respect to the normal. The light travels at a speed of 2.27 x 108 m/s through the oil. Determine the angle of refraction. Round off your answers into two decimal points ONLY.

A ray of light enters a flat surface of a block of glass (n=1.52) that is surrounded by water (n=1.33). If the refractive angle is 24.4°, what would be the angle of reflection? Select one: a. 28.17° b. 15.77° c. 18.10° d. 21.19°

A concave mirror has a focal length of 15 cm. What is the magnification if the object's distance is 105 cm?A healthy person has a body temperature of 98.6 oF. Use the properties of blackbody radiation to work out the precise wavelength of the peak radiation. (Hint: Convert Fahrenheit degrees into Kelvin (absolute) degrees.)

To the nearest hundredth of an hour, how many hours are required before a radio signal from a space probe near the planet Uranus reaches Earth, 1.607 *109 km away? A light ray is reflected from a mirror with an angle 15.2° to the normal. What was the angle of incidence? Light passes through a transparent substance at a speed of 2.256 ×108 m/s. Based on the following table, what is the material? index of refraction (n = =) Glass Diamond Substance Ice Water Ethyl alcohol (Click to select) ✓ (Click to select) Ice Diamond Glass Ethyl alcohol Water 1.50 2.42 1.31 1.33 1.36 The wavelength of a monochromatic light source is measured to be 5.06 x10-7 m in a diffraction experiment. (a) What is the frequency? x 1014 Hz (b) What is the energy of a photon of this light? 10-19 J

A ray of light is pointed at the surface of a block of fused quartz at an angle of 30.0° with respect to the normal (a line perpendicular to the surface at the spot where the ray hits the block). Part of the light is reflected and the rest refracted. What is the angle (in degrees) between the reflected and refracted rays? O

Total internal reflection: The speed of light in a material is 0.39c. What is the critical angle of a light ray in degrees at the interface between the material and a vacuum? (keep 2 sig figs please)